/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/pals_lcr.5.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:37:10,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:37:10,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:37:10,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:37:10,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:37:10,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:37:10,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:37:10,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:37:10,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:37:10,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:37:10,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:37:10,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:37:10,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:37:10,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:37:10,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:37:10,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:37:10,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:37:10,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:37:10,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:37:10,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:37:10,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:37:10,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:37:10,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:37:10,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:37:10,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:37:10,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:37:10,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:37:10,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:37:10,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:37:10,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:37:10,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:37:10,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:37:10,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:37:10,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:37:10,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:37:10,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:37:10,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:37:10,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:37:10,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:37:10,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:37:10,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:37:10,177 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 18:37:10,190 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:37:10,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:37:10,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:37:10,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:37:10,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:37:10,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:37:10,191 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:37:10,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:37:10,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:37:10,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:37:10,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:37:10,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:37:10,194 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:37:10,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:37:10,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:37:10,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:37:10,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:37:10,357 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:37:10,357 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:37:10,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_lcr.5.ufo.BOUNDED-10.pals.c [2022-01-10 18:37:10,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2798b25e/5b5fb5db1dee4801ba7cc2c47e00e0ca/FLAGaedc1e605 [2022-01-10 18:37:10,819 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:37:10,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_lcr.5.ufo.BOUNDED-10.pals.c [2022-01-10 18:37:10,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2798b25e/5b5fb5db1dee4801ba7cc2c47e00e0ca/FLAGaedc1e605 [2022-01-10 18:37:11,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2798b25e/5b5fb5db1dee4801ba7cc2c47e00e0ca [2022-01-10 18:37:11,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:37:11,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:37:11,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:37:11,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:37:11,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:37:11,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42073e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11, skipping insertion in model container [2022-01-10 18:37:11,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:37:11,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:37:11,415 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/pals_lcr.5.ufo.BOUNDED-10.pals.c[11233,11246] [2022-01-10 18:37:11,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:37:11,423 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:37:11,457 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/pals_lcr.5.ufo.BOUNDED-10.pals.c[11233,11246] [2022-01-10 18:37:11,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:37:11,467 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:37:11,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11 WrapperNode [2022-01-10 18:37:11,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:37:11,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:37:11,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:37:11,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:37:11,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,498 INFO L137 Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 315 [2022-01-10 18:37:11,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:37:11,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:37:11,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:37:11,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:37:11,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:37:11,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:37:11,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:37:11,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:37:11,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (1/1) ... [2022-01-10 18:37:11,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:37:11,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:37:11,568 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 18:37:11,572 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 18:37:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:37:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:37:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:37:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:37:11,710 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:37:11,712 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:37:12,093 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:37:12,101 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:37:12,101 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 18:37:12,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:12 BoogieIcfgContainer [2022-01-10 18:37:12,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:37:12,103 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:37:12,103 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:37:12,106 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:37:12,108 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:12" (1/1) ... [2022-01-10 18:37:12,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:37:12 BasicIcfg [2022-01-10 18:37:12,371 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:37:12,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:37:12,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:37:12,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:37:12,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:37:11" (1/4) ... [2022-01-10 18:37:12,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40636e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:12, skipping insertion in model container [2022-01-10 18:37:12,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:11" (2/4) ... [2022-01-10 18:37:12,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40636e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:12, skipping insertion in model container [2022-01-10 18:37:12,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:12" (3/4) ... [2022-01-10 18:37:12,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40636e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:37:12, skipping insertion in model container [2022-01-10 18:37:12,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:37:12" (4/4) ... [2022-01-10 18:37:12,379 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.cTransformedIcfg [2022-01-10 18:37:12,382 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:37:12,382 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:37:12,423 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:37:12,428 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 18:37:12,428 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:37:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 91 states have (on average 1.7252747252747254) internal successors, (157), 92 states have internal predecessors, (157), 0 states have call successors, (0), 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 18:37:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 18:37:12,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:12,442 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] [2022-01-10 18:37:12,443 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:12,446 INFO L85 PathProgramCache]: Analyzing trace with hash -349743886, now seen corresponding path program 1 times [2022-01-10 18:37:12,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:12,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433619649] [2022-01-10 18:37:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:12,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:12,579 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 18:37:12,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:12,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433619649] [2022-01-10 18:37:12,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433619649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:12,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:12,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 18:37:12,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925401958] [2022-01-10 18:37:12,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:12,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 18:37:12,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 18:37:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 18:37:12,607 INFO L87 Difference]: Start difference. First operand has 93 states, 91 states have (on average 1.7252747252747254) internal successors, (157), 92 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 18:37:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:12,633 INFO L93 Difference]: Finished difference Result 150 states and 246 transitions. [2022-01-10 18:37:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 18:37:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2022-01-10 18:37:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:12,641 INFO L225 Difference]: With dead ends: 150 [2022-01-10 18:37:12,641 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 18:37:12,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 18:37:12,650 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:12,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 18:37:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-01-10 18:37:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.7045454545454546) internal successors, (150), 88 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 18:37:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 150 transitions. [2022-01-10 18:37:12,684 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 150 transitions. Word has length 33 [2022-01-10 18:37:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:12,684 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 150 transitions. [2022-01-10 18:37:12,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 18:37:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 150 transitions. [2022-01-10 18:37:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 18:37:12,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:12,688 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] [2022-01-10 18:37:12,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:37:12,689 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:12,691 INFO L85 PathProgramCache]: Analyzing trace with hash -604480431, now seen corresponding path program 1 times [2022-01-10 18:37:12,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:12,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100039297] [2022-01-10 18:37:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:12,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:12,902 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 18:37:12,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:12,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100039297] [2022-01-10 18:37:12,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100039297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:12,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:12,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:37:12,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483220020] [2022-01-10 18:37:12,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:12,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:37:12,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:37:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:37:12,905 INFO L87 Difference]: Start difference. First operand 89 states and 150 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 18:37:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:12,991 INFO L93 Difference]: Finished difference Result 145 states and 236 transitions. [2022-01-10 18:37:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:37:12,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2022-01-10 18:37:12,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:12,994 INFO L225 Difference]: With dead ends: 145 [2022-01-10 18:37:12,994 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 18:37:12,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:37:12,997 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 3 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:12,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 558 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 18:37:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-01-10 18:37:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3522727272727273) internal successors, (119), 88 states have internal predecessors, (119), 0 states have call successors, (0), 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 18:37:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2022-01-10 18:37:13,001 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 33 [2022-01-10 18:37:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2022-01-10 18:37:13,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 18:37:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2022-01-10 18:37:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 18:37:13,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:13,003 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] [2022-01-10 18:37:13,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:37:13,003 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash -965498049, now seen corresponding path program 1 times [2022-01-10 18:37:13,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:13,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361905122] [2022-01-10 18:37:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:13,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:13,175 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 18:37:13,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:13,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361905122] [2022-01-10 18:37:13,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361905122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:13,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:13,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:37:13,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71203414] [2022-01-10 18:37:13,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:13,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:37:13,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:13,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:37:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:37:13,178 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:13,194 INFO L93 Difference]: Finished difference Result 187 states and 273 transitions. [2022-01-10 18:37:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:37:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 18:37:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:13,197 INFO L225 Difference]: With dead ends: 187 [2022-01-10 18:37:13,197 INFO L226 Difference]: Without dead ends: 135 [2022-01-10 18:37:13,199 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 18:37:13,199 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 68 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:13,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 258 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:13,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-10 18:37:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-01-10 18:37:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.4318181818181819) internal successors, (189), 132 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 189 transitions. [2022-01-10 18:37:13,206 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 189 transitions. Word has length 63 [2022-01-10 18:37:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:13,207 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 189 transitions. [2022-01-10 18:37:13,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:13,210 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 189 transitions. [2022-01-10 18:37:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 18:37:13,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:13,212 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] [2022-01-10 18:37:13,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 18:37:13,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:13,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2007443232, now seen corresponding path program 1 times [2022-01-10 18:37:13,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:13,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642126091] [2022-01-10 18:37:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:13,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:13,355 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 18:37:13,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:13,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642126091] [2022-01-10 18:37:13,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642126091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:13,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:13,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:37:13,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294025563] [2022-01-10 18:37:13,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:13,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:37:13,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:13,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:37:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:37:13,361 INFO L87 Difference]: Start difference. First operand 133 states and 189 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:13,380 INFO L93 Difference]: Finished difference Result 313 states and 473 transitions. [2022-01-10 18:37:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:37:13,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 18:37:13,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:13,382 INFO L225 Difference]: With dead ends: 313 [2022-01-10 18:37:13,382 INFO L226 Difference]: Without dead ends: 217 [2022-01-10 18:37:13,384 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 18:37:13,389 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 64 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:13,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 257 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-10 18:37:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2022-01-10 18:37:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.485981308411215) internal successors, (318), 214 states have internal predecessors, (318), 0 states have call successors, (0), 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 18:37:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 318 transitions. [2022-01-10 18:37:13,398 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 318 transitions. Word has length 63 [2022-01-10 18:37:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:13,398 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 318 transitions. [2022-01-10 18:37:13,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 318 transitions. [2022-01-10 18:37:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 18:37:13,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:13,399 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] [2022-01-10 18:37:13,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:37:13,399 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash 342884097, now seen corresponding path program 1 times [2022-01-10 18:37:13,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:13,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371260283] [2022-01-10 18:37:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:13,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:13,522 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 18:37:13,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:13,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371260283] [2022-01-10 18:37:13,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371260283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:13,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:13,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:37:13,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657143767] [2022-01-10 18:37:13,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:13,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:37:13,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:37:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:37:13,526 INFO L87 Difference]: Start difference. First operand 215 states and 318 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:13,545 INFO L93 Difference]: Finished difference Result 547 states and 840 transitions. [2022-01-10 18:37:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:37:13,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 18:37:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:13,548 INFO L225 Difference]: With dead ends: 547 [2022-01-10 18:37:13,548 INFO L226 Difference]: Without dead ends: 369 [2022-01-10 18:37:13,549 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 18:37:13,549 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 60 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:13,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 256 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-10 18:37:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 367. [2022-01-10 18:37:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.5136612021857923) internal successors, (554), 366 states have internal predecessors, (554), 0 states have call successors, (0), 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 18:37:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 554 transitions. [2022-01-10 18:37:13,580 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 554 transitions. Word has length 63 [2022-01-10 18:37:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:13,581 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 554 transitions. [2022-01-10 18:37:13,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:13,581 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 554 transitions. [2022-01-10 18:37:13,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 18:37:13,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:13,582 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] [2022-01-10 18:37:13,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 18:37:13,582 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:13,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1618387550, now seen corresponding path program 1 times [2022-01-10 18:37:13,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:13,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293438178] [2022-01-10 18:37:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:13,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:13,690 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 18:37:13,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:13,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293438178] [2022-01-10 18:37:13,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293438178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:13,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:13,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:37:13,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929922088] [2022-01-10 18:37:13,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:13,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:37:13,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:13,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:37:13,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:37:13,692 INFO L87 Difference]: Start difference. First operand 367 states and 554 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:13,705 INFO L93 Difference]: Finished difference Result 979 states and 1508 transitions. [2022-01-10 18:37:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:37:13,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 18:37:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:13,707 INFO L225 Difference]: With dead ends: 979 [2022-01-10 18:37:13,707 INFO L226 Difference]: Without dead ends: 649 [2022-01-10 18:37:13,708 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 18:37:13,708 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 56 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:13,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 255 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-10 18:37:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2022-01-10 18:37:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 1.520123839009288) internal successors, (982), 646 states have internal predecessors, (982), 0 states have call successors, (0), 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 18:37:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 982 transitions. [2022-01-10 18:37:13,733 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 982 transitions. Word has length 63 [2022-01-10 18:37:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:13,734 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 982 transitions. [2022-01-10 18:37:13,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 982 transitions. [2022-01-10 18:37:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 18:37:13,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:13,738 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] [2022-01-10 18:37:13,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 18:37:13,738 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash -795527997, now seen corresponding path program 1 times [2022-01-10 18:37:13,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:13,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042300887] [2022-01-10 18:37:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:13,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:14,153 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 18:37:14,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:14,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042300887] [2022-01-10 18:37:14,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042300887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:14,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:14,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 18:37:14,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065957055] [2022-01-10 18:37:14,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:14,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:37:14,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:37:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:37:14,154 INFO L87 Difference]: Start difference. First operand 647 states and 982 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:15,849 INFO L93 Difference]: Finished difference Result 6747 states and 10432 transitions. [2022-01-10 18:37:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:37:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 18:37:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:15,868 INFO L225 Difference]: With dead ends: 6747 [2022-01-10 18:37:15,868 INFO L226 Difference]: Without dead ends: 6137 [2022-01-10 18:37:15,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:37:15,870 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 915 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:15,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 1748 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 18:37:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2022-01-10 18:37:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 1255. [2022-01-10 18:37:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 1.5103668261563) internal successors, (1894), 1254 states have internal predecessors, (1894), 0 states have call successors, (0), 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 18:37:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1894 transitions. [2022-01-10 18:37:16,110 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1894 transitions. Word has length 63 [2022-01-10 18:37:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:16,110 INFO L470 AbstractCegarLoop]: Abstraction has 1255 states and 1894 transitions. [2022-01-10 18:37:16,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1894 transitions. [2022-01-10 18:37:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 18:37:16,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:16,111 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] [2022-01-10 18:37:16,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 18:37:16,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash -947030329, now seen corresponding path program 1 times [2022-01-10 18:37:16,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:16,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904231567] [2022-01-10 18:37:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:16,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:16,202 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 18:37:16,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:16,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904231567] [2022-01-10 18:37:16,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904231567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:16,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:16,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:37:16,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490657514] [2022-01-10 18:37:16,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:16,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:37:16,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:37:16,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:37:16,203 INFO L87 Difference]: Start difference. First operand 1255 states and 1894 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:18,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:37:20,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:37:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:21,073 INFO L93 Difference]: Finished difference Result 3483 states and 5240 transitions. [2022-01-10 18:37:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:37:21,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 18:37:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:21,079 INFO L225 Difference]: With dead ends: 3483 [2022-01-10 18:37:21,080 INFO L226 Difference]: Without dead ends: 2265 [2022-01-10 18:37:21,081 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 18:37:21,082 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 69 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:21,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 293 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-01-10 18:37:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2022-01-10 18:37:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2263. [2022-01-10 18:37:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 1.46684350132626) internal successors, (3318), 2262 states have internal predecessors, (3318), 0 states have call successors, (0), 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 18:37:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3318 transitions. [2022-01-10 18:37:21,538 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3318 transitions. Word has length 65 [2022-01-10 18:37:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:21,538 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 3318 transitions. [2022-01-10 18:37:21,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3318 transitions. [2022-01-10 18:37:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 18:37:21,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:21,539 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] [2022-01-10 18:37:21,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 18:37:21,540 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash -915630615, now seen corresponding path program 1 times [2022-01-10 18:37:21,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:21,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503004734] [2022-01-10 18:37:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:21,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:21,973 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 18:37:21,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:21,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503004734] [2022-01-10 18:37:21,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503004734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:21,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:21,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 18:37:21,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130689768] [2022-01-10 18:37:21,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:21,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:37:21,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:21,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:37:21,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:37:21,974 INFO L87 Difference]: Start difference. First operand 2263 states and 3318 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:26,121 INFO L93 Difference]: Finished difference Result 13403 states and 19728 transitions. [2022-01-10 18:37:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:37:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 18:37:26,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:26,152 INFO L225 Difference]: With dead ends: 13403 [2022-01-10 18:37:26,152 INFO L226 Difference]: Without dead ends: 11177 [2022-01-10 18:37:26,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:37:26,156 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 904 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:26,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 1774 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 18:37:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11177 states. [2022-01-10 18:37:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11177 to 2263. [2022-01-10 18:37:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 1.4597701149425288) internal successors, (3302), 2262 states have internal predecessors, (3302), 0 states have call successors, (0), 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 18:37:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3302 transitions. [2022-01-10 18:37:26,893 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3302 transitions. Word has length 65 [2022-01-10 18:37:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:26,893 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 3302 transitions. [2022-01-10 18:37:26,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3302 transitions. [2022-01-10 18:37:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 18:37:26,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:26,894 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] [2022-01-10 18:37:26,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 18:37:26,894 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:26,894 INFO L85 PathProgramCache]: Analyzing trace with hash -68958498, now seen corresponding path program 1 times [2022-01-10 18:37:26,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:26,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47229415] [2022-01-10 18:37:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:26,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:26,959 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 18:37:26,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:26,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47229415] [2022-01-10 18:37:26,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47229415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:26,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:26,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:37:26,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942557995] [2022-01-10 18:37:26,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:26,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:37:26,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:26,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:37:26,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:37:26,961 INFO L87 Difference]: Start difference. First operand 2263 states and 3302 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:28,118 INFO L93 Difference]: Finished difference Result 5723 states and 8344 transitions. [2022-01-10 18:37:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:37:28,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 18:37:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:28,126 INFO L225 Difference]: With dead ends: 5723 [2022-01-10 18:37:28,127 INFO L226 Difference]: Without dead ends: 3497 [2022-01-10 18:37:28,129 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 18:37:28,129 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 72 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:28,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 266 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:28,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2022-01-10 18:37:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 3495. [2022-01-10 18:37:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 1.4350314825414998) internal successors, (5014), 3494 states have internal predecessors, (5014), 0 states have call successors, (0), 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 18:37:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5014 transitions. [2022-01-10 18:37:29,282 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5014 transitions. Word has length 65 [2022-01-10 18:37:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:29,282 INFO L470 AbstractCegarLoop]: Abstraction has 3495 states and 5014 transitions. [2022-01-10 18:37:29,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5014 transitions. [2022-01-10 18:37:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 18:37:29,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:29,283 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] [2022-01-10 18:37:29,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 18:37:29,283 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:29,283 INFO L85 PathProgramCache]: Analyzing trace with hash 745405865, now seen corresponding path program 1 times [2022-01-10 18:37:29,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:29,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031514484] [2022-01-10 18:37:29,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:29,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:29,443 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 18:37:29,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:29,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031514484] [2022-01-10 18:37:29,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031514484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:29,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:29,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:37:29,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650135076] [2022-01-10 18:37:29,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:29,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:37:29,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:37:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:37:29,444 INFO L87 Difference]: Start difference. First operand 3495 states and 5014 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:30,922 INFO L93 Difference]: Finished difference Result 7997 states and 11530 transitions. [2022-01-10 18:37:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:37:30,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 18:37:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:30,929 INFO L225 Difference]: With dead ends: 7997 [2022-01-10 18:37:30,929 INFO L226 Difference]: Without dead ends: 4539 [2022-01-10 18:37:30,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:37:30,932 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:30,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 193 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4539 states. [2022-01-10 18:37:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4539 to 4537. [2022-01-10 18:37:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4536 states have (on average 1.433862433862434) internal successors, (6504), 4536 states have internal predecessors, (6504), 0 states have call successors, (0), 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 18:37:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 6504 transitions. [2022-01-10 18:37:32,369 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 6504 transitions. Word has length 66 [2022-01-10 18:37:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:32,369 INFO L470 AbstractCegarLoop]: Abstraction has 4537 states and 6504 transitions. [2022-01-10 18:37:32,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 6504 transitions. [2022-01-10 18:37:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 18:37:32,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:32,369 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] [2022-01-10 18:37:32,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 18:37:32,369 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:32,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1654150529, now seen corresponding path program 1 times [2022-01-10 18:37:32,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:32,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038238617] [2022-01-10 18:37:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:32,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:32,447 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 18:37:32,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:32,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038238617] [2022-01-10 18:37:32,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038238617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:32,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:32,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:37:32,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440136868] [2022-01-10 18:37:32,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:32,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:37:32,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:32,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:37:32,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:37:32,448 INFO L87 Difference]: Start difference. First operand 4537 states and 6504 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:34,410 INFO L93 Difference]: Finished difference Result 6324 states and 9105 transitions. [2022-01-10 18:37:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:37:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 18:37:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:34,423 INFO L225 Difference]: With dead ends: 6324 [2022-01-10 18:37:34,423 INFO L226 Difference]: Without dead ends: 6322 [2022-01-10 18:37:34,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 18:37:34,425 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 283 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:34,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 501 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6322 states. [2022-01-10 18:37:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6322 to 4633. [2022-01-10 18:37:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 4632 states have (on average 1.4145077720207253) internal successors, (6552), 4632 states have internal predecessors, (6552), 0 states have call successors, (0), 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 18:37:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 6552 transitions. [2022-01-10 18:37:36,011 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 6552 transitions. Word has length 66 [2022-01-10 18:37:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:36,011 INFO L470 AbstractCegarLoop]: Abstraction has 4633 states and 6552 transitions. [2022-01-10 18:37:36,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 6552 transitions. [2022-01-10 18:37:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-10 18:37:36,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:36,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:37:36,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 18:37:36,013 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash -681766910, now seen corresponding path program 1 times [2022-01-10 18:37:36,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496163766] [2022-01-10 18:37:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:36,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:37:36,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:36,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496163766] [2022-01-10 18:37:36,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496163766] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:37:36,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:37:36,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:37:36,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447106404] [2022-01-10 18:37:36,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:37:36,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:37:36,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:37:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:37:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:37:36,109 INFO L87 Difference]: Start difference. First operand 4633 states and 6552 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:37:37,418 INFO L93 Difference]: Finished difference Result 8218 states and 11629 transitions. [2022-01-10 18:37:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:37:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-01-10 18:37:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:37:37,424 INFO L225 Difference]: With dead ends: 8218 [2022-01-10 18:37:37,424 INFO L226 Difference]: Without dead ends: 3624 [2022-01-10 18:37:37,428 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 18:37:37,429 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 51 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:37:37,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 265 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:37:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2022-01-10 18:37:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 3472. [2022-01-10 18:37:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3471 states have (on average 1.4070872947277442) internal successors, (4884), 3471 states have internal predecessors, (4884), 0 states have call successors, (0), 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 18:37:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 4884 transitions. [2022-01-10 18:37:38,601 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 4884 transitions. Word has length 94 [2022-01-10 18:37:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:37:38,602 INFO L470 AbstractCegarLoop]: Abstraction has 3472 states and 4884 transitions. [2022-01-10 18:37:38,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:37:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 4884 transitions. [2022-01-10 18:37:38,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-10 18:37:38,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:37:38,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:37:38,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 18:37:38,604 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:37:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:37:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash -771202815, now seen corresponding path program 1 times [2022-01-10 18:37:38,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:37:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882123065] [2022-01-10 18:37:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:38,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:37:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:37:38,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:37:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882123065] [2022-01-10 18:37:38,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882123065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:37:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394388513] [2022-01-10 18:37:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:37:38,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:37:38,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:37:39,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:37:39,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:37:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:37:39,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 18:37:39,708 INFO L286 TraceCheckSpWp]: Computing forward predicates...