/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_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:54:28,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:54:28,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:54:28,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:54:28,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:54:28,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:54:28,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:54:28,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:54:28,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:54:28,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:54:28,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:54:28,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:54:28,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:54:28,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:54:28,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:54:28,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:54:28,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:54:28,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:54:28,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:54:28,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:54:28,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:54:28,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:54:28,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:54:28,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:54:28,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:54:28,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:54:28,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:54:28,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:54:28,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:54:28,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:54:28,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:54:28,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:54:28,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:54:28,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:54:28,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:54:28,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:54:28,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:54:28,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:54:28,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:54:28,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:54:28,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:54:28,234 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 18:54:28,252 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:54:28,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:54:28,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:54:28,253 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:54:28,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:54:28,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:54:28,254 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:54:28,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:54:28,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:54:28,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:54:28,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:54:28,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:54:28,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:54:28,255 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:54:28,255 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:54:28,255 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:54:28,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:54:28,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:54:28,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:54:28,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:54:28,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:54:28,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:54:28,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:54:28,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:54:28,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:54:28,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:54:28,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:54:28,257 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:54:28,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:54:28,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:54:28,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:54:28,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:54:28,258 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:54:28,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:54:28,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:54:28,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:54:28,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:54:28,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:54:28,453 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:54:28,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-01-10 18:54:28,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fd9f4991/a950732f6e5046e2ba440ce699c6bba8/FLAG07df08f75 [2022-01-10 18:54:28,901 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:54:28,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2022-01-10 18:54:28,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fd9f4991/a950732f6e5046e2ba440ce699c6bba8/FLAG07df08f75 [2022-01-10 18:54:28,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fd9f4991/a950732f6e5046e2ba440ce699c6bba8 [2022-01-10 18:54:28,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:54:28,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:54:28,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:54:28,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:54:28,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:54:28,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:54:28" (1/1) ... [2022-01-10 18:54:28,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d04c813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:28, skipping insertion in model container [2022-01-10 18:54:28,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:54:28" (1/1) ... [2022-01-10 18:54:28,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:54:28,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:54:29,174 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_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2022-01-10 18:54:29,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:54:29,221 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:54:29,274 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_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2022-01-10 18:54:29,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:54:29,315 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:54:29,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29 WrapperNode [2022-01-10 18:54:29,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:54:29,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:54:29,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:54:29,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:54:29,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,368 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 636 [2022-01-10 18:54:29,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:54:29,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:54:29,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:54:29,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:54:29,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:54:29,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:54:29,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:54:29,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:54:29,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (1/1) ... [2022-01-10 18:54:29,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:54:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:54:29,444 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 18:54:29,470 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 18:54:29,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:54:29,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:54:29,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:54:29,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:54:29,630 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:54:29,636 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:54:30,035 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:54:30,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:54:30,043 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:54:30,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:54:30 BoogieIcfgContainer [2022-01-10 18:54:30,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:54:30,045 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:54:30,045 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:54:30,046 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:54:30,049 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:54:30" (1/1) ... [2022-01-10 18:54:30,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:54:30 BasicIcfg [2022-01-10 18:54:30,562 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:54:30,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:54:30,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:54:30,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:54:30,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:54:28" (1/4) ... [2022-01-10 18:54:30,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b630a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:54:30, skipping insertion in model container [2022-01-10 18:54:30,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:54:29" (2/4) ... [2022-01-10 18:54:30,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b630a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:54:30, skipping insertion in model container [2022-01-10 18:54:30,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:54:30" (3/4) ... [2022-01-10 18:54:30,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b630a47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:54:30, skipping insertion in model container [2022-01-10 18:54:30,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:54:30" (4/4) ... [2022-01-10 18:54:30,572 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.cTransformedIcfg [2022-01-10 18:54:30,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:54:30,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:54:30,624 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:54:30,633 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 18:54:30,634 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:54:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 169 states have (on average 1.7218934911242603) internal successors, (291), 170 states have internal predecessors, (291), 0 states have call successors, (0), 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 18:54:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 18:54:30,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:54:30,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:54:30,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:54:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:54:30,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1774879326, now seen corresponding path program 1 times [2022-01-10 18:54:30,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:54:30,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48385214] [2022-01-10 18:54:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:54:30,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:54:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:54:31,232 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 18:54:31,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:54:31,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48385214] [2022-01-10 18:54:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48385214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:54:31,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:54:31,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:54:31,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29493608] [2022-01-10 18:54:31,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:54:31,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:54:31,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:54:31,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:54:31,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:54:31,273 INFO L87 Difference]: Start difference. First operand has 171 states, 169 states have (on average 1.7218934911242603) internal successors, (291), 170 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:54:31,809 INFO L93 Difference]: Finished difference Result 346 states and 569 transitions. [2022-01-10 18:54:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:54:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 18:54:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:54:31,831 INFO L225 Difference]: With dead ends: 346 [2022-01-10 18:54:31,831 INFO L226 Difference]: Without dead ends: 261 [2022-01-10 18:54:31,838 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 18:54:31,842 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 148 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:54:31,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 538 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 18:54:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-10 18:54:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 259. [2022-01-10 18:54:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.5) internal successors, (387), 258 states have internal predecessors, (387), 0 states have call successors, (0), 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 18:54:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 387 transitions. [2022-01-10 18:54:31,946 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 387 transitions. Word has length 64 [2022-01-10 18:54:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:54:31,947 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 387 transitions. [2022-01-10 18:54:31,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 387 transitions. [2022-01-10 18:54:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 18:54:31,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:54:31,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:54:31,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:54:31,952 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:54:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:54:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash -814300912, now seen corresponding path program 1 times [2022-01-10 18:54:31,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:54:31,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167272462] [2022-01-10 18:54:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:54:31,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:54:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:54:32,193 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 18:54:32,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:54:32,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167272462] [2022-01-10 18:54:32,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167272462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:54:32,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:54:32,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:54:32,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492573657] [2022-01-10 18:54:32,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:54:32,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:54:32,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:54:32,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:54:32,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:54:32,201 INFO L87 Difference]: Start difference. First operand 259 states and 387 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:54:32,313 INFO L93 Difference]: Finished difference Result 398 states and 603 transitions. [2022-01-10 18:54:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:54:32,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 18:54:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:54:32,317 INFO L225 Difference]: With dead ends: 398 [2022-01-10 18:54:32,317 INFO L226 Difference]: Without dead ends: 396 [2022-01-10 18:54:32,322 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 18:54:32,323 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 338 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:54:32,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 613 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:54:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-10 18:54:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 261. [2022-01-10 18:54:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.4961538461538462) internal successors, (389), 260 states have internal predecessors, (389), 0 states have call successors, (0), 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 18:54:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 389 transitions. [2022-01-10 18:54:32,367 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 389 transitions. Word has length 65 [2022-01-10 18:54:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:54:32,368 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 389 transitions. [2022-01-10 18:54:32,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 389 transitions. [2022-01-10 18:54:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 18:54:32,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:54:32,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:54:32,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:54:32,376 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:54:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:54:32,381 INFO L85 PathProgramCache]: Analyzing trace with hash 527456540, now seen corresponding path program 1 times [2022-01-10 18:54:32,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:54:32,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591670643] [2022-01-10 18:54:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:54:32,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:54:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:54:32,634 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 18:54:32,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:54:32,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591670643] [2022-01-10 18:54:32,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591670643] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:54:32,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:54:32,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 18:54:32,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392597654] [2022-01-10 18:54:32,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:54:32,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 18:54:32,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:54:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 18:54:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:54:32,637 INFO L87 Difference]: Start difference. First operand 261 states and 389 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:54:33,304 INFO L93 Difference]: Finished difference Result 1476 states and 2281 transitions. [2022-01-10 18:54:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 18:54:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 18:54:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:54:33,310 INFO L225 Difference]: With dead ends: 1476 [2022-01-10 18:54:33,310 INFO L226 Difference]: Without dead ends: 1274 [2022-01-10 18:54:33,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-10 18:54:33,313 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 1737 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:54:33,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 1209 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:54:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-01-10 18:54:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 818. [2022-01-10 18:54:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.5287637698898409) internal successors, (1249), 817 states have internal predecessors, (1249), 0 states have call successors, (0), 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 18:54:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1249 transitions. [2022-01-10 18:54:33,505 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1249 transitions. Word has length 66 [2022-01-10 18:54:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:54:33,505 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1249 transitions. [2022-01-10 18:54:33,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1249 transitions. [2022-01-10 18:54:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 18:54:33,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:54:33,507 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] [2022-01-10 18:54:33,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 18:54:33,508 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:54:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:54:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1634677299, now seen corresponding path program 1 times [2022-01-10 18:54:33,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:54:33,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315834128] [2022-01-10 18:54:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:54:33,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:54:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:54:33,919 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 18:54:33,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:54:33,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315834128] [2022-01-10 18:54:33,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315834128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:54:33,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:54:33,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 18:54:33,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596014398] [2022-01-10 18:54:33,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:54:33,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 18:54:33,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:54:33,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 18:54:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 18:54:33,922 INFO L87 Difference]: Start difference. First operand 818 states and 1249 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:35,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:54:38,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:54:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:54:38,559 INFO L93 Difference]: Finished difference Result 1822 states and 2815 transitions. [2022-01-10 18:54:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 18:54:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 18:54:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:54:38,565 INFO L225 Difference]: With dead ends: 1822 [2022-01-10 18:54:38,565 INFO L226 Difference]: Without dead ends: 1294 [2022-01-10 18:54:38,567 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 18:54:38,568 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 212 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:54:38,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 687 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-01-10 18:54:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-01-10 18:54:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1292. [2022-01-10 18:54:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 1.5344694035631294) internal successors, (1981), 1291 states have internal predecessors, (1981), 0 states have call successors, (0), 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 18:54:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 1981 transitions. [2022-01-10 18:54:38,831 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 1981 transitions. Word has length 67 [2022-01-10 18:54:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:54:38,832 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 1981 transitions. [2022-01-10 18:54:38,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 1981 transitions. [2022-01-10 18:54:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 18:54:38,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:54:38,833 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] [2022-01-10 18:54:38,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:54:38,833 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:54:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:54:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1266438025, now seen corresponding path program 1 times [2022-01-10 18:54:38,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:54:38,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523464168] [2022-01-10 18:54:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:54:38,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:54:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:54:38,962 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 18:54:38,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:54:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523464168] [2022-01-10 18:54:38,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523464168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:54:38,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:54:38,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:54:38,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332296778] [2022-01-10 18:54:38,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:54:38,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:54:38,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:54:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:54:38,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:54:38,965 INFO L87 Difference]: Start difference. First operand 1292 states and 1981 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:39,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:54:39,293 INFO L93 Difference]: Finished difference Result 2379 states and 3663 transitions. [2022-01-10 18:54:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:54:39,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 18:54:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:54:39,300 INFO L225 Difference]: With dead ends: 2379 [2022-01-10 18:54:39,300 INFO L226 Difference]: Without dead ends: 1524 [2022-01-10 18:54:39,302 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 18:54:39,303 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 170 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:54:39,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 470 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:54:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2022-01-10 18:54:39,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1522. [2022-01-10 18:54:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 1.5161078238001315) internal successors, (2306), 1521 states have internal predecessors, (2306), 0 states have call successors, (0), 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 18:54:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2306 transitions. [2022-01-10 18:54:39,561 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2306 transitions. Word has length 68 [2022-01-10 18:54:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:54:39,561 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 2306 transitions. [2022-01-10 18:54:39,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2306 transitions. [2022-01-10 18:54:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 18:54:39,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:54:39,562 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] [2022-01-10 18:54:39,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 18:54:39,563 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:54:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:54:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1902624580, now seen corresponding path program 1 times [2022-01-10 18:54:39,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:54:39,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713534906] [2022-01-10 18:54:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:54:39,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:54:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:54:39,678 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 18:54:39,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:54:39,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713534906] [2022-01-10 18:54:39,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713534906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:54:39,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:54:39,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:54:39,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386689138] [2022-01-10 18:54:39,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:54:39,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:54:39,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:54:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:54:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:54:39,681 INFO L87 Difference]: Start difference. First operand 1522 states and 2306 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:54:40,167 INFO L93 Difference]: Finished difference Result 3812 states and 5805 transitions. [2022-01-10 18:54:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:54:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 18:54:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:54:40,185 INFO L225 Difference]: With dead ends: 3812 [2022-01-10 18:54:40,186 INFO L226 Difference]: Without dead ends: 2475 [2022-01-10 18:54:40,189 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 18:54:40,193 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 162 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:54:40,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 456 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:54:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-01-10 18:54:40,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2464. [2022-01-10 18:54:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 1.4961429151441332) internal successors, (3685), 2463 states have internal predecessors, (3685), 0 states have call successors, (0), 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 18:54:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 3685 transitions. [2022-01-10 18:54:40,597 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 3685 transitions. Word has length 68 [2022-01-10 18:54:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:54:40,597 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 3685 transitions. [2022-01-10 18:54:40,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 3685 transitions. [2022-01-10 18:54:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 18:54:40,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:54:40,599 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] [2022-01-10 18:54:40,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 18:54:40,600 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:54:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:54:40,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1690427753, now seen corresponding path program 1 times [2022-01-10 18:54:40,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:54:40,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660786671] [2022-01-10 18:54:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:54:40,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:54:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:54:40,936 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 18:54:40,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:54:40,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660786671] [2022-01-10 18:54:40,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660786671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:54:40,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:54:40,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 18:54:40,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505571560] [2022-01-10 18:54:40,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:54:40,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 18:54:40,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:54:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 18:54:40,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:54:40,938 INFO L87 Difference]: Start difference. First operand 2464 states and 3685 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:54:43,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:54:46,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:54:48,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:54:50,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:54:52,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:54:57,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:54:57,693 INFO L93 Difference]: Finished difference Result 18989 states and 28510 transitions. [2022-01-10 18:54:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 18:54:57,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 18:54:57,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:54:57,755 INFO L225 Difference]: With dead ends: 18989 [2022-01-10 18:54:57,756 INFO L226 Difference]: Without dead ends: 16624 [2022-01-10 18:54:57,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-10 18:54:57,764 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 1538 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 27 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-01-10 18:54:57,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1538 Valid, 919 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 555 Invalid, 5 Unknown, 0 Unchecked, 12.7s Time] [2022-01-10 18:54:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16624 states. [2022-01-10 18:55:01,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16624 to 12658. [2022-01-10 18:55:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12658 states, 12657 states have (on average 1.4839219404282216) internal successors, (18782), 12657 states have internal predecessors, (18782), 0 states have call successors, (0), 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 18:55:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12658 states to 12658 states and 18782 transitions. [2022-01-10 18:55:01,248 INFO L78 Accepts]: Start accepts. Automaton has 12658 states and 18782 transitions. Word has length 68 [2022-01-10 18:55:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:55:01,249 INFO L470 AbstractCegarLoop]: Abstraction has 12658 states and 18782 transitions. [2022-01-10 18:55:01,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:55:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 12658 states and 18782 transitions. [2022-01-10 18:55:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 18:55:01,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:55:01,252 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] [2022-01-10 18:55:01,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 18:55:01,253 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:55:01,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:55:01,253 INFO L85 PathProgramCache]: Analyzing trace with hash -837072037, now seen corresponding path program 1 times [2022-01-10 18:55:01,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:55:01,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312844333] [2022-01-10 18:55:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:55:01,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:55:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:55:01,371 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 18:55:01,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:55:01,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312844333] [2022-01-10 18:55:01,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312844333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:55:01,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:55:01,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:55:01,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002067328] [2022-01-10 18:55:01,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:55:01,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:55:01,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:55:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:55:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:55:01,373 INFO L87 Difference]: Start difference. First operand 12658 states and 18782 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:55:04,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:55:04,943 INFO L93 Difference]: Finished difference Result 19236 states and 28444 transitions. [2022-01-10 18:55:04,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:55:04,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 18:55:04,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:55:04,973 INFO L225 Difference]: With dead ends: 19236 [2022-01-10 18:55:04,973 INFO L226 Difference]: Without dead ends: 13720 [2022-01-10 18:55:04,983 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 18:55:04,984 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 137 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:55:04,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 453 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:55:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13720 states. [2022-01-10 18:55:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13720 to 13718. [2022-01-10 18:55:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13718 states, 13717 states have (on average 1.455711890355034) internal successors, (19968), 13717 states have internal predecessors, (19968), 0 states have call successors, (0), 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 18:55:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13718 states to 13718 states and 19968 transitions. [2022-01-10 18:55:08,516 INFO L78 Accepts]: Start accepts. Automaton has 13718 states and 19968 transitions. Word has length 68 [2022-01-10 18:55:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:55:08,516 INFO L470 AbstractCegarLoop]: Abstraction has 13718 states and 19968 transitions. [2022-01-10 18:55:08,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:55:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 13718 states and 19968 transitions. [2022-01-10 18:55:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 18:55:08,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:55:08,520 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] [2022-01-10 18:55:08,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 18:55:08,520 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:55:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:55:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2032891240, now seen corresponding path program 1 times [2022-01-10 18:55:08,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:55:08,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493226384] [2022-01-10 18:55:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:55:08,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:55:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:55:08,608 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 18:55:08,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:55:08,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493226384] [2022-01-10 18:55:08,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493226384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:55:08,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:55:08,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:55:08,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975986028] [2022-01-10 18:55:08,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:55:08,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:55:08,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:55:08,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:55:08,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:55:08,610 INFO L87 Difference]: Start difference. First operand 13718 states and 19968 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:55:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:55:13,957 INFO L93 Difference]: Finished difference Result 36533 states and 53243 transitions. [2022-01-10 18:55:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:55:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-01-10 18:55:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:55:14,009 INFO L225 Difference]: With dead ends: 36533 [2022-01-10 18:55:14,009 INFO L226 Difference]: Without dead ends: 23681 [2022-01-10 18:55:14,031 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 18:55:14,031 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 141 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:55:14,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 543 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:55:14,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23681 states. [2022-01-10 18:55:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23681 to 23523. [2022-01-10 18:55:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23523 states, 23522 states have (on average 1.437080180256781) internal successors, (33803), 23522 states have internal predecessors, (33803), 0 states have call successors, (0), 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 18:55:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23523 states to 23523 states and 33803 transitions. [2022-01-10 18:55:19,865 INFO L78 Accepts]: Start accepts. Automaton has 23523 states and 33803 transitions. Word has length 68 [2022-01-10 18:55:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:55:19,865 INFO L470 AbstractCegarLoop]: Abstraction has 23523 states and 33803 transitions. [2022-01-10 18:55:19,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:55:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 23523 states and 33803 transitions. [2022-01-10 18:55:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 18:55:19,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:55:19,870 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] [2022-01-10 18:55:19,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 18:55:19,871 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:55:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:55:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1179535524, now seen corresponding path program 1 times [2022-01-10 18:55:19,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:55:19,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351950718] [2022-01-10 18:55:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:55:19,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:55:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:55:20,265 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 18:55:20,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:55:20,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351950718] [2022-01-10 18:55:20,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351950718] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:55:20,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:55:20,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 18:55:20,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923481028] [2022-01-10 18:55:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:55:20,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 18:55:20,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:55:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 18:55:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-01-10 18:55:20,266 INFO L87 Difference]: Start difference. First operand 23523 states and 33803 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 18:55:23,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:55:25,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []