/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:46:42,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:46:42,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:46:42,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:46:42,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:46:42,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:46:42,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:46:42,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:46:42,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:46:42,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:46:42,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:46:42,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:46:42,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:46:42,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:46:42,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:46:42,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:46:42,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:46:42,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:46:42,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:46:42,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:46:42,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:46:42,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:46:42,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:46:42,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:46:42,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:46:42,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:46:42,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:46:42,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:46:42,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:46:42,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:46:42,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:46:42,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:46:42,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:46:42,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:46:42,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:46:42,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:46:42,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:46:42,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:46:42,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:46:42,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:46:42,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:46:42,189 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 18:46:42,213 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:46:42,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:46:42,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:46:42,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:46:42,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:46:42,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:46:42,215 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:46:42,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:46:42,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:46:42,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:46:42,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:46:42,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:46:42,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:46:42,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:46:42,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:46:42,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:46:42,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:46:42,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:46:42,217 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:46:42,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:46:42,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:46:42,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:46:42,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:46:42,218 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:46:42,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:46:42,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:46:42,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:46:42,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:46:42,418 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:46:42,419 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:46:42,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-01-10 18:46:42,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914b80a90/12b6d85d8c81492d93d2ebb5baeddac2/FLAG270c3405b [2022-01-10 18:46:42,851 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:46:42,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-01-10 18:46:42,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914b80a90/12b6d85d8c81492d93d2ebb5baeddac2/FLAG270c3405b [2022-01-10 18:46:42,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914b80a90/12b6d85d8c81492d93d2ebb5baeddac2 [2022-01-10 18:46:42,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:46:42,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:46:42,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:46:42,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:46:42,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:46:42,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:42" (1/1) ... [2022-01-10 18:46:42,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f068cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:42, skipping insertion in model container [2022-01-10 18:46:42,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:42" (1/1) ... [2022-01-10 18:46:42,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:46:42,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:46:43,256 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14419,14432] [2022-01-10 18:46:43,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:46:43,325 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:46:43,398 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14419,14432] [2022-01-10 18:46:43,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:46:43,456 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:46:43,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43 WrapperNode [2022-01-10 18:46:43,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:46:43,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:46:43,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:46:43,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:46:43,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,529 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1166 [2022-01-10 18:46:43,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:46:43,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:46:43,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:46:43,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:46:43,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:46:43,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:46:43,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:46:43,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:46:43,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (1/1) ... [2022-01-10 18:46:43,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:46:43,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:46:43,629 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 18:46:43,632 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 18:46:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:46:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:46:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:46:43,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:46:43,779 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:46:43,781 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:46:44,597 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:46:44,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:46:44,611 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:46:44,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:44 BoogieIcfgContainer [2022-01-10 18:46:44,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:46:44,614 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:46:44,614 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:46:44,616 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:46:44,618 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:44" (1/1) ... [2022-01-10 18:46:45,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:46:45 BasicIcfg [2022-01-10 18:46:45,095 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:46:45,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:46:45,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:46:45,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:46:45,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:46:42" (1/4) ... [2022-01-10 18:46:45,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db254a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:45, skipping insertion in model container [2022-01-10 18:46:45,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:43" (2/4) ... [2022-01-10 18:46:45,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db254a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:45, skipping insertion in model container [2022-01-10 18:46:45,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:44" (3/4) ... [2022-01-10 18:46:45,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db254a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:46:45, skipping insertion in model container [2022-01-10 18:46:45,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:46:45" (4/4) ... [2022-01-10 18:46:45,102 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.cTransformedIcfg [2022-01-10 18:46:45,105 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:46:45,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:46:45,141 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:46:45,146 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 18:46:45,147 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:46:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 310 states have (on average 1.7806451612903227) internal successors, (552), 311 states have internal predecessors, (552), 0 states have call successors, (0), 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 18:46:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-10 18:46:45,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:45,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:45,178 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:45,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:45,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1352374193, now seen corresponding path program 1 times [2022-01-10 18:46:45,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:45,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726850896] [2022-01-10 18:46:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:45,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:45,638 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 18:46:45,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:45,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726850896] [2022-01-10 18:46:45,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726850896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:45,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:45,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:46:45,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642867788] [2022-01-10 18:46:45,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:45,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:46:45,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:46:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:46:45,669 INFO L87 Difference]: Start difference. First operand has 312 states, 310 states have (on average 1.7806451612903227) internal successors, (552), 311 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 18:46:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:45,781 INFO L93 Difference]: Finished difference Result 890 states and 1579 transitions. [2022-01-10 18:46:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:46:45,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2022-01-10 18:46:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:45,806 INFO L225 Difference]: With dead ends: 890 [2022-01-10 18:46:45,806 INFO L226 Difference]: Without dead ends: 597 [2022-01-10 18:46:45,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:45,814 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 1135 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:45,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 1447 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-10 18:46:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 595. [2022-01-10 18:46:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.4545454545454546) internal successors, (864), 594 states have internal predecessors, (864), 0 states have call successors, (0), 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 18:46:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 864 transitions. [2022-01-10 18:46:45,892 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 864 transitions. Word has length 146 [2022-01-10 18:46:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:45,892 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 864 transitions. [2022-01-10 18:46:45,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 18:46:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 864 transitions. [2022-01-10 18:46:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-10 18:46:45,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:45,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:45,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:46:45,903 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:45,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash 498530030, now seen corresponding path program 1 times [2022-01-10 18:46:45,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:45,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160980153] [2022-01-10 18:46:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:45,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:46,067 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 18:46:46,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:46,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160980153] [2022-01-10 18:46:46,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160980153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:46,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:46,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:46:46,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199170618] [2022-01-10 18:46:46,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:46,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:46:46,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:46,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:46:46,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:46:46,070 INFO L87 Difference]: Start difference. First operand 595 states and 864 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 18:46:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:46,124 INFO L93 Difference]: Finished difference Result 1747 states and 2528 transitions. [2022-01-10 18:46:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:46:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2022-01-10 18:46:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:46,129 INFO L225 Difference]: With dead ends: 1747 [2022-01-10 18:46:46,129 INFO L226 Difference]: Without dead ends: 1180 [2022-01-10 18:46:46,134 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 18:46:46,135 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 442 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:46,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 1336 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-01-10 18:46:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 597. [2022-01-10 18:46:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.4530201342281879) internal successors, (866), 596 states have internal predecessors, (866), 0 states have call successors, (0), 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 18:46:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 866 transitions. [2022-01-10 18:46:46,166 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 866 transitions. Word has length 147 [2022-01-10 18:46:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:46,168 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 866 transitions. [2022-01-10 18:46:46,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 18:46:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 866 transitions. [2022-01-10 18:46:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 18:46:46,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:46,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:46,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:46:46,173 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:46,177 INFO L85 PathProgramCache]: Analyzing trace with hash 652437962, now seen corresponding path program 1 times [2022-01-10 18:46:46,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:46,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535961239] [2022-01-10 18:46:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:46,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:46,403 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 18:46:46,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535961239] [2022-01-10 18:46:46,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535961239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:46,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:46,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:46:46,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810351774] [2022-01-10 18:46:46,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:46,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:46:46,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:46,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:46:46,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:46,405 INFO L87 Difference]: Start difference. First operand 597 states and 866 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 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 18:46:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:46,553 INFO L93 Difference]: Finished difference Result 2302 states and 3326 transitions. [2022-01-10 18:46:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:46:46,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-01-10 18:46:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:46,559 INFO L225 Difference]: With dead ends: 2302 [2022-01-10 18:46:46,559 INFO L226 Difference]: Without dead ends: 1717 [2022-01-10 18:46:46,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:46:46,561 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 1441 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:46,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1441 Valid, 1869 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:46:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-01-10 18:46:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1148. [2022-01-10 18:46:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 1.4350479511769834) internal successors, (1646), 1147 states have internal predecessors, (1646), 0 states have call successors, (0), 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 18:46:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1646 transitions. [2022-01-10 18:46:46,620 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1646 transitions. Word has length 148 [2022-01-10 18:46:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:46,620 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 1646 transitions. [2022-01-10 18:46:46,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 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 18:46:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1646 transitions. [2022-01-10 18:46:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 18:46:46,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:46,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:46,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 18:46:46,622 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:46,623 INFO L85 PathProgramCache]: Analyzing trace with hash -12970706, now seen corresponding path program 1 times [2022-01-10 18:46:46,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:46,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890332302] [2022-01-10 18:46:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:46,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:46,736 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 18:46:46,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:46,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890332302] [2022-01-10 18:46:46,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890332302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:46,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:46,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:46:46,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096614721] [2022-01-10 18:46:46,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:46,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:46:46,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:46,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:46:46,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:46:46,753 INFO L87 Difference]: Start difference. First operand 1148 states and 1646 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 18:46:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:46,818 INFO L93 Difference]: Finished difference Result 2009 states and 2873 transitions. [2022-01-10 18:46:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:46:46,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-01-10 18:46:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:46,821 INFO L225 Difference]: With dead ends: 2009 [2022-01-10 18:46:46,821 INFO L226 Difference]: Without dead ends: 877 [2022-01-10 18:46:46,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:46,824 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 69 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:46,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1394 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-10 18:46:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2022-01-10 18:46:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.428082191780822) internal successors, (1251), 876 states have internal predecessors, (1251), 0 states have call successors, (0), 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 18:46:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1251 transitions. [2022-01-10 18:46:46,872 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1251 transitions. Word has length 148 [2022-01-10 18:46:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:46,872 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1251 transitions. [2022-01-10 18:46:46,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 18:46:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1251 transitions. [2022-01-10 18:46:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 18:46:46,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:46,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:46,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:46:46,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1896346950, now seen corresponding path program 1 times [2022-01-10 18:46:46,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:46,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444123072] [2022-01-10 18:46:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:46,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:46:46,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:46,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444123072] [2022-01-10 18:46:46,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444123072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:46,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:46,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:46:46,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482870227] [2022-01-10 18:46:46,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:46,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:46:46,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:46:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:46:46,955 INFO L87 Difference]: Start difference. First operand 877 states and 1251 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:47,020 INFO L93 Difference]: Finished difference Result 1736 states and 2466 transitions. [2022-01-10 18:46:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:46:47,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-01-10 18:46:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:47,025 INFO L225 Difference]: With dead ends: 1736 [2022-01-10 18:46:47,025 INFO L226 Difference]: Without dead ends: 1161 [2022-01-10 18:46:47,026 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 18:46:47,028 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 435 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:47,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 938 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-01-10 18:46:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 877. [2022-01-10 18:46:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.4269406392694064) internal successors, (1250), 876 states have internal predecessors, (1250), 0 states have call successors, (0), 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 18:46:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1250 transitions. [2022-01-10 18:46:47,076 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1250 transitions. Word has length 155 [2022-01-10 18:46:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:47,077 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1250 transitions. [2022-01-10 18:46:47,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1250 transitions. [2022-01-10 18:46:47,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 18:46:47,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:47,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:47,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 18:46:47,083 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1258905033, now seen corresponding path program 1 times [2022-01-10 18:46:47,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:47,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685927723] [2022-01-10 18:46:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:47,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:47,199 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 18:46:47,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:47,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685927723] [2022-01-10 18:46:47,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685927723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:47,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:47,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:46:47,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278271073] [2022-01-10 18:46:47,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:47,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:46:47,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:46:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:46:47,201 INFO L87 Difference]: Start difference. First operand 877 states and 1250 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:47,286 INFO L93 Difference]: Finished difference Result 2248 states and 3235 transitions. [2022-01-10 18:46:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:46:47,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-01-10 18:46:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:47,292 INFO L225 Difference]: With dead ends: 2248 [2022-01-10 18:46:47,292 INFO L226 Difference]: Without dead ends: 1628 [2022-01-10 18:46:47,293 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 18:46:47,295 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 377 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:47,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1246 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2022-01-10 18:46:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1626. [2022-01-10 18:46:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 1.4172307692307693) internal successors, (2303), 1625 states have internal predecessors, (2303), 0 states have call successors, (0), 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 18:46:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2303 transitions. [2022-01-10 18:46:47,379 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2303 transitions. Word has length 156 [2022-01-10 18:46:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:47,380 INFO L470 AbstractCegarLoop]: Abstraction has 1626 states and 2303 transitions. [2022-01-10 18:46:47,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2303 transitions. [2022-01-10 18:46:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 18:46:47,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:47,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:47,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 18:46:47,383 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash 426994902, now seen corresponding path program 1 times [2022-01-10 18:46:47,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:47,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943967484] [2022-01-10 18:46:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:47,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:47,469 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 18:46:47,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:47,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943967484] [2022-01-10 18:46:47,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943967484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:47,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:47,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:46:47,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191416451] [2022-01-10 18:46:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:47,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:46:47,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:46:47,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:46:47,471 INFO L87 Difference]: Start difference. First operand 1626 states and 2303 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:47,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:47,637 INFO L93 Difference]: Finished difference Result 4029 states and 5700 transitions. [2022-01-10 18:46:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:46:47,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-01-10 18:46:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:47,645 INFO L225 Difference]: With dead ends: 4029 [2022-01-10 18:46:47,645 INFO L226 Difference]: Without dead ends: 2486 [2022-01-10 18:46:47,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:46:47,650 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 1211 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:47,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 952 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2022-01-10 18:46:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1631. [2022-01-10 18:46:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 1.4141104294478528) internal successors, (2305), 1630 states have internal predecessors, (2305), 0 states have call successors, (0), 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 18:46:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2305 transitions. [2022-01-10 18:46:47,741 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2305 transitions. Word has length 156 [2022-01-10 18:46:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:47,742 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2305 transitions. [2022-01-10 18:46:47,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2305 transitions. [2022-01-10 18:46:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 18:46:47,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:47,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:47,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 18:46:47,744 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:47,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1250154836, now seen corresponding path program 1 times [2022-01-10 18:46:47,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:47,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774943986] [2022-01-10 18:46:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:47,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:47,846 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 18:46:47,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774943986] [2022-01-10 18:46:47,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774943986] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:47,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:47,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:46:47,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905289497] [2022-01-10 18:46:47,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:47,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:46:47,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:46:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:46:47,848 INFO L87 Difference]: Start difference. First operand 1631 states and 2305 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:48,077 INFO L93 Difference]: Finished difference Result 4658 states and 6569 transitions. [2022-01-10 18:46:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:46:48,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-01-10 18:46:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:48,088 INFO L225 Difference]: With dead ends: 4658 [2022-01-10 18:46:48,088 INFO L226 Difference]: Without dead ends: 3095 [2022-01-10 18:46:48,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:48,092 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 885 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:48,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 1160 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2022-01-10 18:46:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 3093. [2022-01-10 18:46:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 1.3997412677878396) internal successors, (4328), 3092 states have internal predecessors, (4328), 0 states have call successors, (0), 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 18:46:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 4328 transitions. [2022-01-10 18:46:48,335 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 4328 transitions. Word has length 156 [2022-01-10 18:46:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:48,335 INFO L470 AbstractCegarLoop]: Abstraction has 3093 states and 4328 transitions. [2022-01-10 18:46:48,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 4328 transitions. [2022-01-10 18:46:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-10 18:46:48,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:48,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:48,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 18:46:48,339 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:48,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1861643403, now seen corresponding path program 1 times [2022-01-10 18:46:48,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:48,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537953746] [2022-01-10 18:46:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:48,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:48,436 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 18:46:48,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:48,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537953746] [2022-01-10 18:46:48,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537953746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:48,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:48,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:46:48,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645894782] [2022-01-10 18:46:48,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:48,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:46:48,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:48,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:46:48,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:46:48,439 INFO L87 Difference]: Start difference. First operand 3093 states and 4328 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 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 18:46:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:48,596 INFO L93 Difference]: Finished difference Result 4469 states and 6282 transitions. [2022-01-10 18:46:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:46:48,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-01-10 18:46:48,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:48,637 INFO L225 Difference]: With dead ends: 4469 [2022-01-10 18:46:48,637 INFO L226 Difference]: Without dead ends: 2578 [2022-01-10 18:46:48,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:48,640 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 47 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:48,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1375 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-01-10 18:46:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2578. [2022-01-10 18:46:48,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 1.4000776096235934) internal successors, (3608), 2577 states have internal predecessors, (3608), 0 states have call successors, (0), 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 18:46:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3608 transitions. [2022-01-10 18:46:48,826 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 3608 transitions. Word has length 158 [2022-01-10 18:46:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:48,827 INFO L470 AbstractCegarLoop]: Abstraction has 2578 states and 3608 transitions. [2022-01-10 18:46:48,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 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 18:46:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 3608 transitions. [2022-01-10 18:46:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-10 18:46:48,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:48,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:48,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 18:46:48,830 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:48,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1337457231, now seen corresponding path program 1 times [2022-01-10 18:46:48,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:48,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312787777] [2022-01-10 18:46:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:48,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:48,947 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 18:46:48,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:48,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312787777] [2022-01-10 18:46:48,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312787777] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:48,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:48,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:46:48,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061976763] [2022-01-10 18:46:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:48,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:46:48,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:46:48,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:48,951 INFO L87 Difference]: Start difference. First operand 2578 states and 3608 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 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 18:46:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:49,265 INFO L93 Difference]: Finished difference Result 6773 states and 9448 transitions. [2022-01-10 18:46:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:46:49,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-01-10 18:46:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:49,277 INFO L225 Difference]: With dead ends: 6773 [2022-01-10 18:46:49,277 INFO L226 Difference]: Without dead ends: 4239 [2022-01-10 18:46:49,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:46:49,281 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 1249 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:49,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 2222 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2022-01-10 18:46:49,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 2727. [2022-01-10 18:46:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 1.3870139398385914) internal successors, (3781), 2726 states have internal predecessors, (3781), 0 states have call successors, (0), 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 18:46:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3781 transitions. [2022-01-10 18:46:49,478 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3781 transitions. Word has length 158 [2022-01-10 18:46:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:49,478 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3781 transitions. [2022-01-10 18:46:49,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 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 18:46:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3781 transitions. [2022-01-10 18:46:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-10 18:46:49,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:49,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:49,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 18:46:49,482 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:49,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:49,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2084721587, now seen corresponding path program 1 times [2022-01-10 18:46:49,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:49,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698989858] [2022-01-10 18:46:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:49,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:49,552 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 18:46:49,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:49,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698989858] [2022-01-10 18:46:49,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698989858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:49,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:49,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:46:49,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752964438] [2022-01-10 18:46:49,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:49,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:46:49,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:46:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:46:49,554 INFO L87 Difference]: Start difference. First operand 2727 states and 3781 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 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 18:46:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:49,698 INFO L93 Difference]: Finished difference Result 4904 states and 6788 transitions. [2022-01-10 18:46:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:46:49,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-01-10 18:46:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:49,705 INFO L225 Difference]: With dead ends: 4904 [2022-01-10 18:46:49,705 INFO L226 Difference]: Without dead ends: 2213 [2022-01-10 18:46:49,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:49,709 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 47 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:49,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1370 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2022-01-10 18:46:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 2213. [2022-01-10 18:46:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 1.3815551537070525) internal successors, (3056), 2212 states have internal predecessors, (3056), 0 states have call successors, (0), 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 18:46:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3056 transitions. [2022-01-10 18:46:49,906 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3056 transitions. Word has length 158 [2022-01-10 18:46:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:49,907 INFO L470 AbstractCegarLoop]: Abstraction has 2213 states and 3056 transitions. [2022-01-10 18:46:49,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 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 18:46:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3056 transitions. [2022-01-10 18:46:49,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 18:46:49,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:49,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:49,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 18:46:49,911 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:49,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash -208678934, now seen corresponding path program 1 times [2022-01-10 18:46:49,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:49,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829842834] [2022-01-10 18:46:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:49,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:49,976 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 18:46:49,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:49,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829842834] [2022-01-10 18:46:49,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829842834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:49,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:49,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:46:49,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722700654] [2022-01-10 18:46:49,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:49,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:46:49,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:49,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:46:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:46:49,978 INFO L87 Difference]: Start difference. First operand 2213 states and 3056 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:50,144 INFO L93 Difference]: Finished difference Result 4321 states and 5978 transitions. [2022-01-10 18:46:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:46:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-01-10 18:46:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:50,152 INFO L225 Difference]: With dead ends: 4321 [2022-01-10 18:46:50,152 INFO L226 Difference]: Without dead ends: 3043 [2022-01-10 18:46:50,154 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 18:46:50,154 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 421 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:50,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 1193 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2022-01-10 18:46:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 2213. [2022-01-10 18:46:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 1.3801989150090417) internal successors, (3053), 2212 states have internal predecessors, (3053), 0 states have call successors, (0), 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 18:46:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3053 transitions. [2022-01-10 18:46:50,290 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3053 transitions. Word has length 165 [2022-01-10 18:46:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:50,290 INFO L470 AbstractCegarLoop]: Abstraction has 2213 states and 3053 transitions. [2022-01-10 18:46:50,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3053 transitions. [2022-01-10 18:46:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 18:46:50,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:50,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:50,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 18:46:50,294 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2078814936, now seen corresponding path program 1 times [2022-01-10 18:46:50,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:50,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444289337] [2022-01-10 18:46:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:50,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:50,405 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 18:46:50,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:50,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444289337] [2022-01-10 18:46:50,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444289337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:50,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:50,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:46:50,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101212184] [2022-01-10 18:46:50,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:50,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:46:50,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:50,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:46:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:46:50,406 INFO L87 Difference]: Start difference. First operand 2213 states and 3053 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:50,596 INFO L93 Difference]: Finished difference Result 4989 states and 6978 transitions. [2022-01-10 18:46:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:46:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-01-10 18:46:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:50,617 INFO L225 Difference]: With dead ends: 4989 [2022-01-10 18:46:50,617 INFO L226 Difference]: Without dead ends: 3383 [2022-01-10 18:46:50,620 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 18:46:50,621 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 361 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:50,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 1217 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2022-01-10 18:46:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 3381. [2022-01-10 18:46:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.3674556213017752) internal successors, (4622), 3380 states have internal predecessors, (4622), 0 states have call successors, (0), 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 18:46:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4622 transitions. [2022-01-10 18:46:50,823 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4622 transitions. Word has length 166 [2022-01-10 18:46:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:50,823 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4622 transitions. [2022-01-10 18:46:50,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4622 transitions. [2022-01-10 18:46:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 18:46:50,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:50,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:50,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 18:46:50,827 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1057612993, now seen corresponding path program 1 times [2022-01-10 18:46:50,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:50,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186702083] [2022-01-10 18:46:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:50,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:50,923 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 18:46:50,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:50,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186702083] [2022-01-10 18:46:50,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186702083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:50,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:50,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:46:50,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801568939] [2022-01-10 18:46:50,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:50,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:46:50,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:46:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:46:50,924 INFO L87 Difference]: Start difference. First operand 3381 states and 4622 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:51,233 INFO L93 Difference]: Finished difference Result 7650 states and 10565 transitions. [2022-01-10 18:46:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:46:51,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-01-10 18:46:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:51,246 INFO L225 Difference]: With dead ends: 7650 [2022-01-10 18:46:51,246 INFO L226 Difference]: Without dead ends: 5146 [2022-01-10 18:46:51,248 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 18:46:51,249 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 365 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:51,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 1211 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5146 states. [2022-01-10 18:46:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5146 to 5144. [2022-01-10 18:46:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 5143 states have (on average 1.3511569123079914) internal successors, (6949), 5143 states have internal predecessors, (6949), 0 states have call successors, (0), 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 18:46:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 6949 transitions. [2022-01-10 18:46:51,569 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 6949 transitions. Word has length 166 [2022-01-10 18:46:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:51,569 INFO L470 AbstractCegarLoop]: Abstraction has 5144 states and 6949 transitions. [2022-01-10 18:46:51,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 6949 transitions. [2022-01-10 18:46:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 18:46:51,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:51,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:51,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 18:46:51,576 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1510618735, now seen corresponding path program 1 times [2022-01-10 18:46:51,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:51,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417156251] [2022-01-10 18:46:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:51,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:51,703 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 18:46:51,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:51,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417156251] [2022-01-10 18:46:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417156251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:51,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:51,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:46:51,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254667504] [2022-01-10 18:46:51,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:51,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:46:51,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:51,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:46:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:46:51,705 INFO L87 Difference]: Start difference. First operand 5144 states and 6949 transitions. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:52,116 INFO L93 Difference]: Finished difference Result 10282 states and 13897 transitions. [2022-01-10 18:46:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:46:52,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-01-10 18:46:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:52,126 INFO L225 Difference]: With dead ends: 10282 [2022-01-10 18:46:52,126 INFO L226 Difference]: Without dead ends: 5289 [2022-01-10 18:46:52,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:52,132 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 881 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:52,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1108 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2022-01-10 18:46:52,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 5235. [2022-01-10 18:46:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5235 states, 5234 states have (on average 1.3461979365685899) internal successors, (7046), 5234 states have internal predecessors, (7046), 0 states have call successors, (0), 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 18:46:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5235 states to 5235 states and 7046 transitions. [2022-01-10 18:46:52,457 INFO L78 Accepts]: Start accepts. Automaton has 5235 states and 7046 transitions. Word has length 172 [2022-01-10 18:46:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:52,457 INFO L470 AbstractCegarLoop]: Abstraction has 5235 states and 7046 transitions. [2022-01-10 18:46:52,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 5235 states and 7046 transitions. [2022-01-10 18:46:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-10 18:46:52,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:52,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:52,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 18:46:52,463 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:52,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1069996340, now seen corresponding path program 1 times [2022-01-10 18:46:52,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:52,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997531068] [2022-01-10 18:46:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:52,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:52,524 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 18:46:52,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:52,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997531068] [2022-01-10 18:46:52,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997531068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:52,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:52,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:46:52,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94959233] [2022-01-10 18:46:52,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:52,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:46:52,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:52,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:46:52,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:46:52,526 INFO L87 Difference]: Start difference. First operand 5235 states and 7046 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:53,082 INFO L93 Difference]: Finished difference Result 13804 states and 18695 transitions. [2022-01-10 18:46:53,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:46:53,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-01-10 18:46:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:53,100 INFO L225 Difference]: With dead ends: 13804 [2022-01-10 18:46:53,100 INFO L226 Difference]: Without dead ends: 10270 [2022-01-10 18:46:53,105 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 18:46:53,106 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 414 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:53,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 1292 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10270 states. [2022-01-10 18:46:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10270 to 5245. [2022-01-10 18:46:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5245 states, 5244 states have (on average 1.345537757437071) internal successors, (7056), 5244 states have internal predecessors, (7056), 0 states have call successors, (0), 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 18:46:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5245 states to 5245 states and 7056 transitions. [2022-01-10 18:46:53,469 INFO L78 Accepts]: Start accepts. Automaton has 5245 states and 7056 transitions. Word has length 173 [2022-01-10 18:46:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:53,470 INFO L470 AbstractCegarLoop]: Abstraction has 5245 states and 7056 transitions. [2022-01-10 18:46:53,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5245 states and 7056 transitions. [2022-01-10 18:46:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-10 18:46:53,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:53,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:53,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 18:46:53,479 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2007705258, now seen corresponding path program 1 times [2022-01-10 18:46:53,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:53,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931679627] [2022-01-10 18:46:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:53,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:53,612 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 18:46:53,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:53,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931679627] [2022-01-10 18:46:53,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931679627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:53,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:53,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:46:53,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511245732] [2022-01-10 18:46:53,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:53,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:46:53,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:46:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:53,614 INFO L87 Difference]: Start difference. First operand 5245 states and 7056 transitions. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:54,354 INFO L93 Difference]: Finished difference Result 13402 states and 18042 transitions. [2022-01-10 18:46:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:46:54,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-01-10 18:46:54,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:54,369 INFO L225 Difference]: With dead ends: 13402 [2022-01-10 18:46:54,369 INFO L226 Difference]: Without dead ends: 8750 [2022-01-10 18:46:54,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:46:54,375 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 1476 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:54,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 1754 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8750 states. [2022-01-10 18:46:54,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8750 to 5478. [2022-01-10 18:46:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.3344896841336498) internal successors, (7309), 5477 states have internal predecessors, (7309), 0 states have call successors, (0), 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 18:46:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 7309 transitions. [2022-01-10 18:46:54,790 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 7309 transitions. Word has length 174 [2022-01-10 18:46:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:54,790 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 7309 transitions. [2022-01-10 18:46:54,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 7309 transitions. [2022-01-10 18:46:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-10 18:46:54,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:54,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:46:54,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 18:46:54,796 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash -576288242, now seen corresponding path program 1 times [2022-01-10 18:46:54,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:54,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802168505] [2022-01-10 18:46:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:54,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:54,897 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 18:46:54,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802168505] [2022-01-10 18:46:54,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802168505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:54,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:54,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:46:54,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096071523] [2022-01-10 18:46:54,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:54,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:46:54,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:46:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:46:54,898 INFO L87 Difference]: Start difference. First operand 5478 states and 7309 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:46:55,216 INFO L93 Difference]: Finished difference Result 8673 states and 11611 transitions. [2022-01-10 18:46:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:46:55,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-01-10 18:46:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:46:55,223 INFO L225 Difference]: With dead ends: 8673 [2022-01-10 18:46:55,223 INFO L226 Difference]: Without dead ends: 4737 [2022-01-10 18:46:55,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:46:55,228 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 23 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:46:55,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1343 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:46:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4737 states. [2022-01-10 18:46:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4737 to 4737. [2022-01-10 18:46:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4737 states, 4736 states have (on average 1.3321368243243243) internal successors, (6309), 4736 states have internal predecessors, (6309), 0 states have call successors, (0), 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 18:46:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4737 states to 4737 states and 6309 transitions. [2022-01-10 18:46:55,535 INFO L78 Accepts]: Start accepts. Automaton has 4737 states and 6309 transitions. Word has length 174 [2022-01-10 18:46:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:46:55,535 INFO L470 AbstractCegarLoop]: Abstraction has 4737 states and 6309 transitions. [2022-01-10 18:46:55,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:46:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4737 states and 6309 transitions. [2022-01-10 18:46:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-10 18:46:55,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:46:55,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:46:55,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 18:46:55,540 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:46:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:46:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1177011064, now seen corresponding path program 1 times [2022-01-10 18:46:55,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:46:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029622875] [2022-01-10 18:46:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:46:55,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:46:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:46:56,422 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 18:46:56,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:46:56,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029622875] [2022-01-10 18:46:56,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029622875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:46:56,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:46:56,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 18:46:56,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222174102] [2022-01-10 18:46:56,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:46:56,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 18:46:56,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:46:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 18:46:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-10 18:46:56,423 INFO L87 Difference]: Start difference. First operand 4737 states and 6309 transitions. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 9 states have internal predecessors, (176), 0 states have call successors, (0), 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 18:47:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:47:04,366 INFO L93 Difference]: Finished difference Result 26730 states and 39275 transitions. [2022-01-10 18:47:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-10 18:47:04,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 9 states have internal predecessors, (176), 0 states have call successors, (0), 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 176 [2022-01-10 18:47:04,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:47:04,414 INFO L225 Difference]: With dead ends: 26730 [2022-01-10 18:47:04,414 INFO L226 Difference]: Without dead ends: 24864 [2022-01-10 18:47:04,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2022-01-10 18:47:04,422 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 7269 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7269 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-10 18:47:04,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7269 Valid, 3101 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-10 18:47:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24864 states. [2022-01-10 18:47:05,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24864 to 9944. [2022-01-10 18:47:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9944 states, 9943 states have (on average 1.3610580307754199) internal successors, (13533), 9943 states have internal predecessors, (13533), 0 states have call successors, (0), 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 18:47:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9944 states to 9944 states and 13533 transitions. [2022-01-10 18:47:05,974 INFO L78 Accepts]: Start accepts. Automaton has 9944 states and 13533 transitions. Word has length 176 [2022-01-10 18:47:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:47:05,974 INFO L470 AbstractCegarLoop]: Abstraction has 9944 states and 13533 transitions. [2022-01-10 18:47:05,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 9 states have internal predecessors, (176), 0 states have call successors, (0), 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 18:47:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9944 states and 13533 transitions. [2022-01-10 18:47:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-10 18:47:05,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:47:05,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:47:05,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 18:47:05,984 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:47:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:47:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1873191751, now seen corresponding path program 1 times [2022-01-10 18:47:05,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:47:05,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944120489] [2022-01-10 18:47:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:47:05,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:47:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:47:07,020 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 18:47:07,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:47:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944120489] [2022-01-10 18:47:07,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944120489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:47:07,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:47:07,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-10 18:47:07,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761740352] [2022-01-10 18:47:07,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:47:07,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 18:47:07,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:47:07,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 18:47:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-01-10 18:47:07,022 INFO L87 Difference]: Start difference. First operand 9944 states and 13533 transitions. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 11 states have internal predecessors, (176), 0 states have call successors, (0), 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 18:47:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:47:27,734 INFO L93 Difference]: Finished difference Result 57982 states and 79783 transitions. [2022-01-10 18:47:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 18:47:27,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 11 states have internal predecessors, (176), 0 states have call successors, (0), 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 176 [2022-01-10 18:47:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:47:27,802 INFO L225 Difference]: With dead ends: 57982 [2022-01-10 18:47:27,802 INFO L226 Difference]: Without dead ends: 49152 [2022-01-10 18:47:27,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=343, Invalid=917, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 18:47:27,821 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 4851 mSDsluCounter, 4052 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4851 SdHoareTripleChecker+Valid, 4873 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-01-10 18:47:27,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4851 Valid, 4873 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-01-10 18:47:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49152 states. [2022-01-10 18:47:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49152 to 34332. [2022-01-10 18:47:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34332 states, 34331 states have (on average 1.3703941044537007) internal successors, (47047), 34331 states have internal predecessors, (47047), 0 states have call successors, (0), 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 18:47:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34332 states to 34332 states and 47047 transitions. [2022-01-10 18:47:37,467 INFO L78 Accepts]: Start accepts. Automaton has 34332 states and 47047 transitions. Word has length 176 [2022-01-10 18:47:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:47:37,468 INFO L470 AbstractCegarLoop]: Abstraction has 34332 states and 47047 transitions. [2022-01-10 18:47:37,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 11 states have internal predecessors, (176), 0 states have call successors, (0), 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 18:47:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 34332 states and 47047 transitions. [2022-01-10 18:47:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-10 18:47:37,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:47:37,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:47:37,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 18:47:37,496 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:47:37,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:47:37,497 INFO L85 PathProgramCache]: Analyzing trace with hash 632172089, now seen corresponding path program 1 times [2022-01-10 18:47:37,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:47:37,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900428096] [2022-01-10 18:47:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:47:37,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:47:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:47:40,048 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 18:47:40,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:47:40,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900428096] [2022-01-10 18:47:40,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900428096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:47:40,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:47:40,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-10 18:47:40,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375265294] [2022-01-10 18:47:40,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:47:40,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 18:47:40,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:47:40,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 18:47:40,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-01-10 18:47:40,049 INFO L87 Difference]: Start difference. First operand 34332 states and 47047 transitions. Second operand has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)