/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 19:08:20,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 19:08:20,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 19:08:20,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 19:08:20,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 19:08:20,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 19:08:20,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 19:08:20,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 19:08:20,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 19:08:20,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 19:08:20,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 19:08:20,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 19:08:20,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 19:08:20,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 19:08:20,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 19:08:20,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 19:08:20,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 19:08:20,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 19:08:20,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 19:08:20,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 19:08:20,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 19:08:20,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 19:08:20,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 19:08:20,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 19:08:20,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 19:08:20,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 19:08:20,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 19:08:20,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 19:08:20,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 19:08:20,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 19:08:20,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 19:08:20,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 19:08:20,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 19:08:20,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 19:08:20,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 19:08:20,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 19:08:20,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 19:08:20,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 19:08:20,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 19:08:20,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 19:08:20,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 19:08:20,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 19:08:20,235 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 19:08:20,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 19:08:20,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 19:08:20,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 19:08:20,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 19:08:20,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 19:08:20,237 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 19:08:20,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 19:08:20,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 19:08:20,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 19:08:20,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 19:08:20,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 19:08:20,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 19:08:20,238 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 19:08:20,238 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 19:08:20,238 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 19:08:20,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 19:08:20,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 19:08:20,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 19:08:20,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 19:08:20,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 19:08:20,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 19:08:20,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 19:08:20,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 19:08:20,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 19:08:20,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 19:08:20,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 19:08:20,245 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 19:08:20,245 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 19:08:20,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 19:08:20,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 19:08:20,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 19:08:20,247 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 19:08:20,247 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 19:08:20,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 19:08:20,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 19:08:20,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 19:08:20,460 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 19:08:20,461 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 19:08:20,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2022-01-10 19:08:20,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c1af592e/7f3eca87b1034651afb477c8a4343c93/FLAG5a1aeb9ec [2022-01-10 19:08:20,987 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 19:08:20,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2022-01-10 19:08:21,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c1af592e/7f3eca87b1034651afb477c8a4343c93/FLAG5a1aeb9ec [2022-01-10 19:08:21,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c1af592e/7f3eca87b1034651afb477c8a4343c93 [2022-01-10 19:08:21,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 19:08:21,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 19:08:21,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 19:08:21,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 19:08:21,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 19:08:21,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2823926c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21, skipping insertion in model container [2022-01-10 19:08:21,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 19:08:21,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 19:08:21,378 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[15593,15606] [2022-01-10 19:08:21,394 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16240,16253] [2022-01-10 19:08:21,415 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17624,17637] [2022-01-10 19:08:21,431 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18600,18613] [2022-01-10 19:08:21,480 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[27965,27978] [2022-01-10 19:08:21,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 19:08:21,566 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 19:08:21,639 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[15593,15606] [2022-01-10 19:08:21,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[16240,16253] [2022-01-10 19:08:21,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[17624,17637] [2022-01-10 19:08:21,672 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[18600,18613] [2022-01-10 19:08:21,716 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[27965,27978] [2022-01-10 19:08:21,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 19:08:21,770 INFO L208 MainTranslator]: Completed translation [2022-01-10 19:08:21,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21 WrapperNode [2022-01-10 19:08:21,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 19:08:21,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 19:08:21,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 19:08:21,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 19:08:21,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,884 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1681 [2022-01-10 19:08:21,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 19:08:21,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 19:08:21,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 19:08:21,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 19:08:21,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 19:08:21,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 19:08:21,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 19:08:21,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 19:08:21,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (1/1) ... [2022-01-10 19:08:21,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 19:08:21,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 19:08:22,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 19:08:22,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 19:08:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 19:08:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 19:08:22,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 19:08:22,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 19:08:22,211 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 19:08:22,212 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 19:08:23,150 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 19:08:23,162 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 19:08:23,162 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 19:08:23,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:08:23 BoogieIcfgContainer [2022-01-10 19:08:23,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 19:08:23,169 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 19:08:23,169 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 19:08:23,170 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 19:08:23,172 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:08:23" (1/1) ... [2022-01-10 19:08:23,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 07:08:23 BasicIcfg [2022-01-10 19:08:23,949 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 19:08:23,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 19:08:23,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 19:08:23,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 19:08:23,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:08:21" (1/4) ... [2022-01-10 19:08:23,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530e2661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:08:23, skipping insertion in model container [2022-01-10 19:08:23,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:08:21" (2/4) ... [2022-01-10 19:08:23,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530e2661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:08:23, skipping insertion in model container [2022-01-10 19:08:23,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:08:23" (3/4) ... [2022-01-10 19:08:23,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530e2661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 07:08:23, skipping insertion in model container [2022-01-10 19:08:23,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 07:08:23" (4/4) ... [2022-01-10 19:08:23,957 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.cTransformedIcfg [2022-01-10 19:08:23,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 19:08:23,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-01-10 19:08:24,011 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 19:08:24,019 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 [2022-01-10 19:08:24,019 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-10 19:08:24,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 418 states have (on average 1.8038277511961722) internal successors, (754), 423 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-10 19:08:24,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:24,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:24,068 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:24,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:24,075 INFO L85 PathProgramCache]: Analyzing trace with hash 688650408, now seen corresponding path program 1 times [2022-01-10 19:08:24,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:24,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268997309] [2022-01-10 19:08:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:24,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:24,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:24,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268997309] [2022-01-10 19:08:24,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268997309] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:24,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:24,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:24,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547911952] [2022-01-10 19:08:24,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:24,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:24,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:24,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:24,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:24,733 INFO L87 Difference]: Start difference. First operand has 424 states, 418 states have (on average 1.8038277511961722) internal successors, (754), 423 states have internal predecessors, (754), 0 states have call successors, (0), 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 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:24,922 INFO L93 Difference]: Finished difference Result 1222 states and 2177 transitions. [2022-01-10 19:08:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 19:08:24,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-01-10 19:08:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:24,949 INFO L225 Difference]: With dead ends: 1222 [2022-01-10 19:08:24,949 INFO L226 Difference]: Without dead ends: 817 [2022-01-10 19:08:24,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:24,962 INFO L933 BasicCegarLoop]: 1218 mSDtfsCounter, 1636 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1636 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:24,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1636 Valid, 1911 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 19:08:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-10 19:08:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 790. [2022-01-10 19:08:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 785 states have (on average 1.443312101910828) internal successors, (1133), 789 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1133 transitions. [2022-01-10 19:08:25,072 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1133 transitions. Word has length 150 [2022-01-10 19:08:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:25,072 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 1133 transitions. [2022-01-10 19:08:25,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1133 transitions. [2022-01-10 19:08:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-10 19:08:25,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:25,082 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:25,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 19:08:25,083 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:25,085 INFO L85 PathProgramCache]: Analyzing trace with hash -121240856, now seen corresponding path program 1 times [2022-01-10 19:08:25,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:25,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517914217] [2022-01-10 19:08:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:25,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:25,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:25,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517914217] [2022-01-10 19:08:25,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517914217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:25,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:25,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:25,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526819401] [2022-01-10 19:08:25,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:25,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:25,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:25,306 INFO L87 Difference]: Start difference. First operand 790 states and 1133 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:25,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:25,365 INFO L93 Difference]: Finished difference Result 2332 states and 3335 transitions. [2022-01-10 19:08:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-01-10 19:08:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:25,373 INFO L225 Difference]: With dead ends: 2332 [2022-01-10 19:08:25,373 INFO L226 Difference]: Without dead ends: 1570 [2022-01-10 19:08:25,374 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 [2022-01-10 19:08:25,375 INFO L933 BasicCegarLoop]: 1196 mSDtfsCounter, 594 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:25,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 1792 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-01-10 19:08:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 792. [2022-01-10 19:08:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 787 states have (on average 1.4421855146124523) internal successors, (1135), 791 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1135 transitions. [2022-01-10 19:08:25,424 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1135 transitions. Word has length 151 [2022-01-10 19:08:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:25,430 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1135 transitions. [2022-01-10 19:08:25,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1135 transitions. [2022-01-10 19:08:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-10 19:08:25,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:25,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:25,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 19:08:25,433 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:25,434 INFO L85 PathProgramCache]: Analyzing trace with hash -240899901, now seen corresponding path program 1 times [2022-01-10 19:08:25,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:25,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322076352] [2022-01-10 19:08:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:25,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:25,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322076352] [2022-01-10 19:08:25,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322076352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:25,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:25,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 19:08:25,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554196317] [2022-01-10 19:08:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:25,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 19:08:25,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 19:08:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:25,654 INFO L87 Difference]: Start difference. First operand 792 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:25,895 INFO L93 Difference]: Finished difference Result 3071 states and 4380 transitions. [2022-01-10 19:08:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:08:25,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-01-10 19:08:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:25,905 INFO L225 Difference]: With dead ends: 3071 [2022-01-10 19:08:25,906 INFO L226 Difference]: Without dead ends: 2291 [2022-01-10 19:08:25,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 19:08:25,911 INFO L933 BasicCegarLoop]: 1379 mSDtfsCounter, 1702 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 3019 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:25,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 3019 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 19:08:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-01-10 19:08:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1506. [2022-01-10 19:08:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1501 states have (on average 1.4237175216522318) internal successors, (2137), 1505 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2137 transitions. [2022-01-10 19:08:26,049 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2137 transitions. Word has length 152 [2022-01-10 19:08:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:26,050 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2137 transitions. [2022-01-10 19:08:26,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2137 transitions. [2022-01-10 19:08:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-10 19:08:26,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:26,054 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:26,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 19:08:26,054 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash 506364455, now seen corresponding path program 1 times [2022-01-10 19:08:26,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:26,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511296906] [2022-01-10 19:08:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:26,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:26,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511296906] [2022-01-10 19:08:26,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511296906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:26,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:26,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:26,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159672972] [2022-01-10 19:08:26,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:26,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:26,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:26,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:26,213 INFO L87 Difference]: Start difference. First operand 1506 states and 2137 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:26,312 INFO L93 Difference]: Finished difference Result 2647 states and 3747 transitions. [2022-01-10 19:08:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 19:08:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-01-10 19:08:26,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:26,318 INFO L225 Difference]: With dead ends: 2647 [2022-01-10 19:08:26,318 INFO L226 Difference]: Without dead ends: 1157 [2022-01-10 19:08:26,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:26,326 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 69 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:26,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1850 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-10 19:08:26,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1157. [2022-01-10 19:08:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1152 states have (on average 1.4184027777777777) internal successors, (1634), 1156 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1634 transitions. [2022-01-10 19:08:26,410 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1634 transitions. Word has length 152 [2022-01-10 19:08:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:26,411 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1634 transitions. [2022-01-10 19:08:26,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1634 transitions. [2022-01-10 19:08:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 19:08:26,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:26,413 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:26,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 19:08:26,414 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1487491889, now seen corresponding path program 1 times [2022-01-10 19:08:26,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366497584] [2022-01-10 19:08:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:26,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:26,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:26,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366497584] [2022-01-10 19:08:26,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366497584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:26,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:26,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:26,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986820844] [2022-01-10 19:08:26,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:26,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:26,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:26,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:26,520 INFO L87 Difference]: Start difference. First operand 1157 states and 1634 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:26,588 INFO L93 Difference]: Finished difference Result 2325 states and 3264 transitions. [2022-01-10 19:08:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:26,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2022-01-10 19:08:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:26,594 INFO L225 Difference]: With dead ends: 2325 [2022-01-10 19:08:26,594 INFO L226 Difference]: Without dead ends: 1553 [2022-01-10 19:08:26,595 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 [2022-01-10 19:08:26,597 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 586 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:26,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 1250 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-01-10 19:08:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1157. [2022-01-10 19:08:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1152 states have (on average 1.4175347222222223) internal successors, (1633), 1156 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1633 transitions. [2022-01-10 19:08:26,656 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1633 transitions. Word has length 155 [2022-01-10 19:08:26,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:26,656 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1633 transitions. [2022-01-10 19:08:26,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1633 transitions. [2022-01-10 19:08:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 19:08:26,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:26,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:26,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 19:08:26,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:26,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:26,659 INFO L85 PathProgramCache]: Analyzing trace with hash 993865163, now seen corresponding path program 1 times [2022-01-10 19:08:26,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:26,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858110267] [2022-01-10 19:08:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:26,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:26,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:26,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858110267] [2022-01-10 19:08:26,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858110267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:26,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:26,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:26,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772325730] [2022-01-10 19:08:26,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:26,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:26,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:26,778 INFO L87 Difference]: Start difference. First operand 1157 states and 1633 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:26,881 INFO L93 Difference]: Finished difference Result 2528 states and 3658 transitions. [2022-01-10 19:08:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-01-10 19:08:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:26,887 INFO L225 Difference]: With dead ends: 2528 [2022-01-10 19:08:26,887 INFO L226 Difference]: Without dead ends: 1551 [2022-01-10 19:08:26,891 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 [2022-01-10 19:08:26,892 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 315 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:26,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1277 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2022-01-10 19:08:26,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1381. [2022-01-10 19:08:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1376 states have (on average 1.4513081395348837) internal successors, (1997), 1380 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1997 transitions. [2022-01-10 19:08:26,977 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1997 transitions. Word has length 156 [2022-01-10 19:08:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:26,978 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 1997 transitions. [2022-01-10 19:08:26,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1997 transitions. [2022-01-10 19:08:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 19:08:26,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:26,981 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:26,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 19:08:26,981 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:26,981 INFO L85 PathProgramCache]: Analyzing trace with hash 131774182, now seen corresponding path program 1 times [2022-01-10 19:08:26,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:26,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778821060] [2022-01-10 19:08:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:26,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:27,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:27,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778821060] [2022-01-10 19:08:27,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778821060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:27,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:27,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:27,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729784398] [2022-01-10 19:08:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:27,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:27,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:27,123 INFO L87 Difference]: Start difference. First operand 1381 states and 1997 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:27,293 INFO L93 Difference]: Finished difference Result 3698 states and 5377 transitions. [2022-01-10 19:08:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2022-01-10 19:08:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:27,302 INFO L225 Difference]: With dead ends: 3698 [2022-01-10 19:08:27,302 INFO L226 Difference]: Without dead ends: 2597 [2022-01-10 19:08:27,304 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 [2022-01-10 19:08:27,305 INFO L933 BasicCegarLoop]: 1116 mSDtfsCounter, 517 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:27,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1658 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2022-01-10 19:08:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2576. [2022-01-10 19:08:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2571 states have (on average 1.4391287436795022) internal successors, (3700), 2575 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 3700 transitions. [2022-01-10 19:08:27,475 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 3700 transitions. Word has length 159 [2022-01-10 19:08:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:27,476 INFO L470 AbstractCegarLoop]: Abstraction has 2576 states and 3700 transitions. [2022-01-10 19:08:27,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 3700 transitions. [2022-01-10 19:08:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 19:08:27,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:27,479 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:27,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 19:08:27,480 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:27,480 INFO L85 PathProgramCache]: Analyzing trace with hash -570821657, now seen corresponding path program 1 times [2022-01-10 19:08:27,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:27,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334808905] [2022-01-10 19:08:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:27,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:27,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:27,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334808905] [2022-01-10 19:08:27,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334808905] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:27,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:27,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:27,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057494422] [2022-01-10 19:08:27,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:27,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:27,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:27,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:27,589 INFO L87 Difference]: Start difference. First operand 2576 states and 3700 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:27,850 INFO L93 Difference]: Finished difference Result 6431 states and 9227 transitions. [2022-01-10 19:08:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 19:08:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2022-01-10 19:08:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:27,864 INFO L225 Difference]: With dead ends: 6431 [2022-01-10 19:08:27,864 INFO L226 Difference]: Without dead ends: 3942 [2022-01-10 19:08:27,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:27,868 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 1157 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:27,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 1257 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2022-01-10 19:08:28,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 2581. [2022-01-10 19:08:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2576 states have (on average 1.437111801242236) internal successors, (3702), 2580 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 3702 transitions. [2022-01-10 19:08:28,089 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 3702 transitions. Word has length 159 [2022-01-10 19:08:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:28,089 INFO L470 AbstractCegarLoop]: Abstraction has 2581 states and 3702 transitions. [2022-01-10 19:08:28,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 3702 transitions. [2022-01-10 19:08:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 19:08:28,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:28,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:28,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 19:08:28,093 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1637889839, now seen corresponding path program 1 times [2022-01-10 19:08:28,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:28,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341378987] [2022-01-10 19:08:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:28,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:28,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:28,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341378987] [2022-01-10 19:08:28,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341378987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:28,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:28,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:28,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343861032] [2022-01-10 19:08:28,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:28,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:28,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:28,250 INFO L87 Difference]: Start difference. First operand 2581 states and 3702 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:28,673 INFO L93 Difference]: Finished difference Result 7457 states and 10674 transitions. [2022-01-10 19:08:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 19:08:28,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2022-01-10 19:08:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:28,690 INFO L225 Difference]: With dead ends: 7457 [2022-01-10 19:08:28,690 INFO L226 Difference]: Without dead ends: 4944 [2022-01-10 19:08:28,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:28,698 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 1257 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:28,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1257 Valid, 1524 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4944 states. [2022-01-10 19:08:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4944 to 4906. [2022-01-10 19:08:29,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4901 states have (on average 1.4264435829422566) internal successors, (6991), 4905 states have internal predecessors, (6991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 6991 transitions. [2022-01-10 19:08:29,145 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 6991 transitions. Word has length 159 [2022-01-10 19:08:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:29,146 INFO L470 AbstractCegarLoop]: Abstraction has 4906 states and 6991 transitions. [2022-01-10 19:08:29,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 6991 transitions. [2022-01-10 19:08:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 19:08:29,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:29,153 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:29,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 19:08:29,153 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash -514550584, now seen corresponding path program 1 times [2022-01-10 19:08:29,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:29,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656611616] [2022-01-10 19:08:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:29,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:29,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:29,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656611616] [2022-01-10 19:08:29,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656611616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:29,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:29,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:29,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139056529] [2022-01-10 19:08:29,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:29,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:29,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:29,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:29,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:29,266 INFO L87 Difference]: Start difference. First operand 4906 states and 6991 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:29,538 INFO L93 Difference]: Finished difference Result 7213 states and 10307 transitions. [2022-01-10 19:08:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 19:08:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2022-01-10 19:08:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:29,554 INFO L225 Difference]: With dead ends: 7213 [2022-01-10 19:08:29,555 INFO L226 Difference]: Without dead ends: 4106 [2022-01-10 19:08:29,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:29,560 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 47 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:29,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1825 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2022-01-10 19:08:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4106. [2022-01-10 19:08:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4106 states, 4101 states have (on average 1.4259936600829066) internal successors, (5848), 4105 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5848 transitions. [2022-01-10 19:08:29,895 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5848 transitions. Word has length 161 [2022-01-10 19:08:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:29,895 INFO L470 AbstractCegarLoop]: Abstraction has 4106 states and 5848 transitions. [2022-01-10 19:08:29,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5848 transitions. [2022-01-10 19:08:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 19:08:29,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:29,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:29,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 19:08:29,902 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:29,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2012450764, now seen corresponding path program 1 times [2022-01-10 19:08:29,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:29,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804729260] [2022-01-10 19:08:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:29,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:30,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:30,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804729260] [2022-01-10 19:08:30,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804729260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:30,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:30,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 19:08:30,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74298862] [2022-01-10 19:08:30,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:30,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 19:08:30,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 19:08:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:30,029 INFO L87 Difference]: Start difference. First operand 4106 states and 5848 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:30,557 INFO L93 Difference]: Finished difference Result 10807 states and 15343 transitions. [2022-01-10 19:08:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:08:30,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2022-01-10 19:08:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:30,578 INFO L225 Difference]: With dead ends: 10807 [2022-01-10 19:08:30,578 INFO L226 Difference]: Without dead ends: 6745 [2022-01-10 19:08:30,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 19:08:30,585 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1688 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:30,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1688 Valid, 2974 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 19:08:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2022-01-10 19:08:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 4268. [2022-01-10 19:08:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4268 states, 4263 states have (on average 1.415669716162327) internal successors, (6035), 4267 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4268 states to 4268 states and 6035 transitions. [2022-01-10 19:08:30,914 INFO L78 Accepts]: Start accepts. Automaton has 4268 states and 6035 transitions. Word has length 161 [2022-01-10 19:08:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:30,915 INFO L470 AbstractCegarLoop]: Abstraction has 4268 states and 6035 transitions. [2022-01-10 19:08:30,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4268 states and 6035 transitions. [2022-01-10 19:08:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 19:08:30,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:30,920 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:30,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 19:08:30,920 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1075516336, now seen corresponding path program 1 times [2022-01-10 19:08:30,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:30,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917143172] [2022-01-10 19:08:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:30,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:31,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917143172] [2022-01-10 19:08:31,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917143172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:31,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:31,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:31,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815154569] [2022-01-10 19:08:31,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:31,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:31,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:31,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:31,011 INFO L87 Difference]: Start difference. First operand 4268 states and 6035 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:31,263 INFO L93 Difference]: Finished difference Result 7704 states and 10883 transitions. [2022-01-10 19:08:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 19:08:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2022-01-10 19:08:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:31,271 INFO L225 Difference]: With dead ends: 7704 [2022-01-10 19:08:31,271 INFO L226 Difference]: Without dead ends: 3472 [2022-01-10 19:08:31,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:31,277 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 47 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:31,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1820 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2022-01-10 19:08:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 3472. [2022-01-10 19:08:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3467 states have (on average 1.4124603403518892) internal successors, (4897), 3471 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 4897 transitions. [2022-01-10 19:08:31,627 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 4897 transitions. Word has length 161 [2022-01-10 19:08:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:31,628 INFO L470 AbstractCegarLoop]: Abstraction has 3472 states and 4897 transitions. [2022-01-10 19:08:31,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 4897 transitions. [2022-01-10 19:08:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-10 19:08:31,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:31,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:31,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 19:08:31,634 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1489523592, now seen corresponding path program 1 times [2022-01-10 19:08:31,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:31,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760922652] [2022-01-10 19:08:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:31,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:31,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:31,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760922652] [2022-01-10 19:08:31,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760922652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:31,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:31,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:31,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353426299] [2022-01-10 19:08:31,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:31,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:31,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:31,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:31,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:31,730 INFO L87 Difference]: Start difference. First operand 3472 states and 4897 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:32,023 INFO L93 Difference]: Finished difference Result 6882 states and 9717 transitions. [2022-01-10 19:08:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:32,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-01-10 19:08:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:32,037 INFO L225 Difference]: With dead ends: 6882 [2022-01-10 19:08:32,037 INFO L226 Difference]: Without dead ends: 4806 [2022-01-10 19:08:32,040 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 [2022-01-10 19:08:32,041 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 571 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:32,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 1512 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:32,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4806 states. [2022-01-10 19:08:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4806 to 3472. [2022-01-10 19:08:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3467 states have (on average 1.4115950389385636) internal successors, (4894), 3471 states have internal predecessors, (4894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 4894 transitions. [2022-01-10 19:08:32,328 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 4894 transitions. Word has length 164 [2022-01-10 19:08:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:32,328 INFO L470 AbstractCegarLoop]: Abstraction has 3472 states and 4894 transitions. [2022-01-10 19:08:32,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 4894 transitions. [2022-01-10 19:08:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 19:08:32,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:32,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:32,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 19:08:32,333 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:32,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2128452248, now seen corresponding path program 1 times [2022-01-10 19:08:32,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:32,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944788157] [2022-01-10 19:08:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:32,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:32,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:32,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944788157] [2022-01-10 19:08:32,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944788157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:32,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:32,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:32,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884842146] [2022-01-10 19:08:32,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:32,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:32,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:32,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:32,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:32,451 INFO L87 Difference]: Start difference. First operand 3472 states and 4894 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:32,793 INFO L93 Difference]: Finished difference Result 7933 states and 11523 transitions. [2022-01-10 19:08:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:32,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 165 [2022-01-10 19:08:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:32,802 INFO L225 Difference]: With dead ends: 7933 [2022-01-10 19:08:32,803 INFO L226 Difference]: Without dead ends: 4984 [2022-01-10 19:08:32,805 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 [2022-01-10 19:08:32,806 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 316 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:32,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 1257 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2022-01-10 19:08:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 4485. [2022-01-10 19:08:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4480 states have (on average 1.4533482142857144) internal successors, (6511), 4484 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 6511 transitions. [2022-01-10 19:08:33,056 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 6511 transitions. Word has length 165 [2022-01-10 19:08:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:33,056 INFO L470 AbstractCegarLoop]: Abstraction has 4485 states and 6511 transitions. [2022-01-10 19:08:33,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 6511 transitions. [2022-01-10 19:08:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 19:08:33,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:33,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:33,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 19:08:33,061 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1482522668, now seen corresponding path program 1 times [2022-01-10 19:08:33,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:33,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160284785] [2022-01-10 19:08:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:33,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:33,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:33,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160284785] [2022-01-10 19:08:33,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160284785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:33,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:33,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:33,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009156103] [2022-01-10 19:08:33,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:33,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:33,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:33,190 INFO L87 Difference]: Start difference. First operand 4485 states and 6511 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:33,631 INFO L93 Difference]: Finished difference Result 10818 states and 15849 transitions. [2022-01-10 19:08:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-01-10 19:08:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:33,645 INFO L225 Difference]: With dead ends: 10818 [2022-01-10 19:08:33,646 INFO L226 Difference]: Without dead ends: 6996 [2022-01-10 19:08:33,652 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 [2022-01-10 19:08:33,652 INFO L933 BasicCegarLoop]: 1097 mSDtfsCounter, 505 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:33,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 1639 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6996 states. [2022-01-10 19:08:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6996 to 6961. [2022-01-10 19:08:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6956 states have (on average 1.4424956871765382) internal successors, (10034), 6960 states have internal predecessors, (10034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10034 transitions. [2022-01-10 19:08:34,171 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10034 transitions. Word has length 168 [2022-01-10 19:08:34,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:34,172 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 10034 transitions. [2022-01-10 19:08:34,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10034 transitions. [2022-01-10 19:08:34,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 19:08:34,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:34,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:34,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 19:08:34,177 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:34,177 INFO L85 PathProgramCache]: Analyzing trace with hash 880576840, now seen corresponding path program 1 times [2022-01-10 19:08:34,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:34,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453865199] [2022-01-10 19:08:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:34,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:34,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:34,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453865199] [2022-01-10 19:08:34,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453865199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:34,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:34,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:34,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742765456] [2022-01-10 19:08:34,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:34,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:34,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:34,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:34,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:34,326 INFO L87 Difference]: Start difference. First operand 6961 states and 10034 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:35,040 INFO L93 Difference]: Finished difference Result 16790 states and 24368 transitions. [2022-01-10 19:08:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:35,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-01-10 19:08:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:35,060 INFO L225 Difference]: With dead ends: 16790 [2022-01-10 19:08:35,060 INFO L226 Difference]: Without dead ends: 10795 [2022-01-10 19:08:35,070 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 [2022-01-10 19:08:35,071 INFO L933 BasicCegarLoop]: 1075 mSDtfsCounter, 511 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:35,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 1612 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2022-01-10 19:08:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 10760. [2022-01-10 19:08:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10755 states have (on average 1.4272431427243142) internal successors, (15350), 10759 states have internal predecessors, (15350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 15350 transitions. [2022-01-10 19:08:35,817 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 15350 transitions. Word has length 168 [2022-01-10 19:08:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:35,818 INFO L470 AbstractCegarLoop]: Abstraction has 10760 states and 15350 transitions. [2022-01-10 19:08:35,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 15350 transitions. [2022-01-10 19:08:35,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 19:08:35,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:35,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:35,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 19:08:35,825 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:35,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:35,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1145695060, now seen corresponding path program 1 times [2022-01-10 19:08:35,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:35,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594063985] [2022-01-10 19:08:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:35,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:35,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:35,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594063985] [2022-01-10 19:08:35,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594063985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:35,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:35,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:35,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346350357] [2022-01-10 19:08:35,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:35,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:35,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:35,954 INFO L87 Difference]: Start difference. First operand 10760 states and 15350 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:37,082 INFO L93 Difference]: Finished difference Result 24434 states and 35575 transitions. [2022-01-10 19:08:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-01-10 19:08:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:37,108 INFO L225 Difference]: With dead ends: 24434 [2022-01-10 19:08:37,108 INFO L226 Difference]: Without dead ends: 16066 [2022-01-10 19:08:37,122 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 [2022-01-10 19:08:37,122 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 343 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:37,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 1269 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16066 states. [2022-01-10 19:08:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16066 to 14565. [2022-01-10 19:08:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14565 states, 14560 states have (on average 1.4626373626373625) internal successors, (21296), 14564 states have internal predecessors, (21296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14565 states to 14565 states and 21296 transitions. [2022-01-10 19:08:38,218 INFO L78 Accepts]: Start accepts. Automaton has 14565 states and 21296 transitions. Word has length 172 [2022-01-10 19:08:38,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:38,219 INFO L470 AbstractCegarLoop]: Abstraction has 14565 states and 21296 transitions. [2022-01-10 19:08:38,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14565 states and 21296 transitions. [2022-01-10 19:08:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-10 19:08:38,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:38,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:38,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 19:08:38,226 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:38,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1528351186, now seen corresponding path program 1 times [2022-01-10 19:08:38,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:38,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901604335] [2022-01-10 19:08:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:38,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:38,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:38,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901604335] [2022-01-10 19:08:38,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901604335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:38,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:38,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:38,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185712309] [2022-01-10 19:08:38,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:38,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:38,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:38,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:38,400 INFO L87 Difference]: Start difference. First operand 14565 states and 21296 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:39,502 INFO L93 Difference]: Finished difference Result 29170 states and 42639 transitions. [2022-01-10 19:08:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 19:08:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2022-01-10 19:08:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:39,522 INFO L225 Difference]: With dead ends: 29170 [2022-01-10 19:08:39,522 INFO L226 Difference]: Without dead ends: 14762 [2022-01-10 19:08:39,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:39,543 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 1155 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:39,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1155 Valid, 1546 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14762 states. [2022-01-10 19:08:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14762 to 14667. [2022-01-10 19:08:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14667 states, 14662 states have (on average 1.45982812713136) internal successors, (21404), 14666 states have internal predecessors, (21404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14667 states to 14667 states and 21404 transitions. [2022-01-10 19:08:40,595 INFO L78 Accepts]: Start accepts. Automaton has 14667 states and 21404 transitions. Word has length 173 [2022-01-10 19:08:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:40,596 INFO L470 AbstractCegarLoop]: Abstraction has 14667 states and 21404 transitions. [2022-01-10 19:08:40,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 14667 states and 21404 transitions. [2022-01-10 19:08:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-10 19:08:40,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:40,603 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:40,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 19:08:40,603 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash -211479608, now seen corresponding path program 1 times [2022-01-10 19:08:40,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:40,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411119725] [2022-01-10 19:08:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:40,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:40,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:40,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411119725] [2022-01-10 19:08:40,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411119725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:40,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:40,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 19:08:40,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003202483] [2022-01-10 19:08:40,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:40,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 19:08:40,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:40,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 19:08:40,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 19:08:40,684 INFO L87 Difference]: Start difference. First operand 14667 states and 21404 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:42,560 INFO L93 Difference]: Finished difference Result 39687 states and 58097 transitions. [2022-01-10 19:08:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 19:08:42,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-01-10 19:08:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:42,599 INFO L225 Difference]: With dead ends: 39687 [2022-01-10 19:08:42,599 INFO L226 Difference]: Without dead ends: 29125 [2022-01-10 19:08:42,611 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 [2022-01-10 19:08:42,612 INFO L933 BasicCegarLoop]: 1148 mSDtfsCounter, 560 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:42,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1730 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29125 states. [2022-01-10 19:08:43,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29125 to 14677. [2022-01-10 19:08:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14677 states, 14672 states have (on average 1.459514721919302) internal successors, (21414), 14676 states have internal predecessors, (21414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14677 states to 14677 states and 21414 transitions. [2022-01-10 19:08:43,753 INFO L78 Accepts]: Start accepts. Automaton has 14677 states and 21414 transitions. Word has length 174 [2022-01-10 19:08:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:43,753 INFO L470 AbstractCegarLoop]: Abstraction has 14677 states and 21414 transitions. [2022-01-10 19:08:43,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 14677 states and 21414 transitions. [2022-01-10 19:08:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-10 19:08:43,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:43,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:43,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 19:08:43,759 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:43,760 INFO L85 PathProgramCache]: Analyzing trace with hash -802601677, now seen corresponding path program 1 times [2022-01-10 19:08:43,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:43,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469915772] [2022-01-10 19:08:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:43,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:43,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:43,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469915772] [2022-01-10 19:08:43,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469915772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:43,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:43,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 19:08:43,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321945183] [2022-01-10 19:08:43,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:43,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 19:08:43,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:43,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 19:08:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:43,922 INFO L87 Difference]: Start difference. First operand 14677 states and 21414 transitions. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:45,839 INFO L93 Difference]: Finished difference Result 38167 states and 55706 transitions. [2022-01-10 19:08:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:08:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 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 175 [2022-01-10 19:08:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:45,867 INFO L225 Difference]: With dead ends: 38167 [2022-01-10 19:08:45,868 INFO L226 Difference]: Without dead ends: 24580 [2022-01-10 19:08:45,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 19:08:45,879 INFO L933 BasicCegarLoop]: 1426 mSDtfsCounter, 1646 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:45,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1646 Valid, 3037 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 19:08:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24580 states. [2022-01-10 19:08:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24580 to 14935. [2022-01-10 19:08:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14935 states, 14930 states have (on average 1.4529135967849967) internal successors, (21692), 14934 states have internal predecessors, (21692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14935 states to 14935 states and 21692 transitions. [2022-01-10 19:08:47,122 INFO L78 Accepts]: Start accepts. Automaton has 14935 states and 21692 transitions. Word has length 175 [2022-01-10 19:08:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:47,123 INFO L470 AbstractCegarLoop]: Abstraction has 14935 states and 21692 transitions. [2022-01-10 19:08:47,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 14935 states and 21692 transitions. [2022-01-10 19:08:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-10 19:08:47,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:47,129 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:47,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 19:08:47,130 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:47,130 INFO L85 PathProgramCache]: Analyzing trace with hash 697978447, now seen corresponding path program 1 times [2022-01-10 19:08:47,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:47,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381448644] [2022-01-10 19:08:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:47,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:47,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:47,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381448644] [2022-01-10 19:08:47,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381448644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:47,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:47,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:47,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738747882] [2022-01-10 19:08:47,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:47,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:47,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:47,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:47,277 INFO L87 Difference]: Start difference. First operand 14935 states and 21692 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:48,315 INFO L93 Difference]: Finished difference Result 24456 states and 35620 transitions. [2022-01-10 19:08:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 19:08:48,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 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 175 [2022-01-10 19:08:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:48,337 INFO L225 Difference]: With dead ends: 24456 [2022-01-10 19:08:48,337 INFO L226 Difference]: Without dead ends: 13449 [2022-01-10 19:08:48,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:48,350 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 23 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:48,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1781 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13449 states. [2022-01-10 19:08:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13449 to 13449. [2022-01-10 19:08:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13449 states, 13444 states have (on average 1.4564117822076763) internal successors, (19580), 13448 states have internal predecessors, (19580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13449 states to 13449 states and 19580 transitions. [2022-01-10 19:08:49,427 INFO L78 Accepts]: Start accepts. Automaton has 13449 states and 19580 transitions. Word has length 175 [2022-01-10 19:08:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:49,427 INFO L470 AbstractCegarLoop]: Abstraction has 13449 states and 19580 transitions. [2022-01-10 19:08:49,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 13449 states and 19580 transitions. [2022-01-10 19:08:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-10 19:08:49,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:49,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:49,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 19:08:49,433 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:49,433 INFO L85 PathProgramCache]: Analyzing trace with hash 215885238, now seen corresponding path program 1 times [2022-01-10 19:08:49,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:49,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705060430] [2022-01-10 19:08:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:49,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:49,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:49,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705060430] [2022-01-10 19:08:49,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705060430] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:49,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:49,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:49,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351890579] [2022-01-10 19:08:49,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:49,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:49,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:49,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:49,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:49,579 INFO L87 Difference]: Start difference. First operand 13449 states and 19580 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:51,761 INFO L93 Difference]: Finished difference Result 38139 states and 56554 transitions. [2022-01-10 19:08:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:08:51,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-01-10 19:08:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:51,797 INFO L225 Difference]: With dead ends: 38139 [2022-01-10 19:08:51,797 INFO L226 Difference]: Without dead ends: 27003 [2022-01-10 19:08:51,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:51,811 INFO L933 BasicCegarLoop]: 1243 mSDtfsCounter, 853 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 2792 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:51,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 2792 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27003 states. [2022-01-10 19:08:53,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27003 to 14049. [2022-01-10 19:08:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14049 states, 14044 states have (on average 1.4433209911706066) internal successors, (20270), 14048 states have internal predecessors, (20270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14049 states to 14049 states and 20270 transitions. [2022-01-10 19:08:53,047 INFO L78 Accepts]: Start accepts. Automaton has 14049 states and 20270 transitions. Word has length 177 [2022-01-10 19:08:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:53,048 INFO L470 AbstractCegarLoop]: Abstraction has 14049 states and 20270 transitions. [2022-01-10 19:08:53,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 14049 states and 20270 transitions. [2022-01-10 19:08:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-10 19:08:53,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:53,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:53,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-10 19:08:53,054 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:53,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1423803413, now seen corresponding path program 1 times [2022-01-10 19:08:53,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:53,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130877702] [2022-01-10 19:08:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:53,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:53,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:53,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130877702] [2022-01-10 19:08:53,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130877702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:53,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:53,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:53,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676953773] [2022-01-10 19:08:53,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:53,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:53,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:53,211 INFO L87 Difference]: Start difference. First operand 14049 states and 20270 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:55,451 INFO L93 Difference]: Finished difference Result 38857 states and 57284 transitions. [2022-01-10 19:08:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:08:55,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-01-10 19:08:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:55,496 INFO L225 Difference]: With dead ends: 38857 [2022-01-10 19:08:55,496 INFO L226 Difference]: Without dead ends: 27962 [2022-01-10 19:08:55,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:55,517 INFO L933 BasicCegarLoop]: 1220 mSDtfsCounter, 863 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:55,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 2734 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27962 states. [2022-01-10 19:08:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27962 to 15222. [2022-01-10 19:08:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15222 states, 15217 states have (on average 1.4223565748833542) internal successors, (21644), 15221 states have internal predecessors, (21644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15222 states to 15222 states and 21644 transitions. [2022-01-10 19:08:56,966 INFO L78 Accepts]: Start accepts. Automaton has 15222 states and 21644 transitions. Word has length 177 [2022-01-10 19:08:56,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:08:56,966 INFO L470 AbstractCegarLoop]: Abstraction has 15222 states and 21644 transitions. [2022-01-10 19:08:56,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 15222 states and 21644 transitions. [2022-01-10 19:08:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-10 19:08:56,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:08:56,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:08:56,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-10 19:08:56,976 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:08:56,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:08:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1843320244, now seen corresponding path program 1 times [2022-01-10 19:08:56,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:08:56,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008000581] [2022-01-10 19:08:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:08:56,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:08:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:08:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:08:57,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:08:57,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008000581] [2022-01-10 19:08:57,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008000581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:08:57,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:08:57,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 19:08:57,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668764556] [2022-01-10 19:08:57,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:08:57,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 19:08:57,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:08:57,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 19:08:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 19:08:57,159 INFO L87 Difference]: Start difference. First operand 15222 states and 21644 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:08:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 19:08:59,678 INFO L93 Difference]: Finished difference Result 40620 states and 59268 transitions. [2022-01-10 19:08:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 19:08:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-01-10 19:08:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 19:08:59,720 INFO L225 Difference]: With dead ends: 40620 [2022-01-10 19:08:59,721 INFO L226 Difference]: Without dead ends: 29966 [2022-01-10 19:08:59,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 19:08:59,735 INFO L933 BasicCegarLoop]: 1197 mSDtfsCounter, 927 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 19:08:59,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 2675 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 19:08:59,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29966 states. [2022-01-10 19:09:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29966 to 17273. [2022-01-10 19:09:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17273 states, 17268 states have (on average 1.392517952281677) internal successors, (24046), 17272 states have internal predecessors, (24046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:09:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17273 states to 17273 states and 24046 transitions. [2022-01-10 19:09:01,265 INFO L78 Accepts]: Start accepts. Automaton has 17273 states and 24046 transitions. Word has length 177 [2022-01-10 19:09:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 19:09:01,265 INFO L470 AbstractCegarLoop]: Abstraction has 17273 states and 24046 transitions. [2022-01-10 19:09:01,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 19:09:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 17273 states and 24046 transitions. [2022-01-10 19:09:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-10 19:09:01,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 19:09:01,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 19:09:01,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-10 19:09:01,275 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-01-10 19:09:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 19:09:01,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1497418157, now seen corresponding path program 1 times [2022-01-10 19:09:01,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 19:09:01,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571721801] [2022-01-10 19:09:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 19:09:01,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 19:09:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 19:09:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 19:09:02,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 19:09:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571721801] [2022-01-10 19:09:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571721801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 19:09:02,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 19:09:02,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-10 19:09:02,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458130548] [2022-01-10 19:09:02,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 19:09:02,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 19:09:02,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 19:09:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 19:09:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-01-10 19:09:02,674 INFO L87 Difference]: Start difference. First operand 17273 states and 24046 transitions. Second operand has 15 states, 15 states have (on average 11.8) internal successors, (177), 14 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)