/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/verifythis/prefixsum_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:25:39,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:25:39,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:25:39,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:25:39,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:25:39,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:25:39,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:25:39,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:25:39,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:25:39,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:25:39,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:25:39,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:25:39,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:25:39,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:25:39,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:25:39,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:25:39,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:25:39,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:25:39,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:25:39,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:25:39,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:25:39,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:25:39,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:25:39,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:25:39,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:25:39,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:25:39,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:25:39,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:25:39,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:25:39,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:25:39,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:25:39,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:25:39,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:25:39,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:25:39,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:25:39,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:25:39,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:25:39,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:25:39,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:25:39,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:25:39,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:25:39,454 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 18:25:39,481 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:25:39,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:25:39,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:25:39,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:25:39,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:25:39,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:25:39,483 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:25:39,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:25:39,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:25:39,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:25:39,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:25:39,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:25:39,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:25:39,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:25:39,484 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:25:39,485 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:25:39,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:25:39,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:25:39,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:25:39,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:25:39,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:25:39,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:25:39,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:25:39,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:25:39,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:25:39,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:25:39,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:25:39,496 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:25:39,496 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:25:39,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:25:39,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:25:39,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:25:39,497 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:25:39,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:25:39,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:25:39,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:25:39,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:25:39,753 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:25:39,755 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:25:39,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_rec.c [2022-01-10 18:25:39,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/038ffc3ab/56a405f6572c4a379def639d9d0debf2/FLAG70d443915 [2022-01-10 18:25:40,182 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:25:40,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_rec.c [2022-01-10 18:25:40,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/038ffc3ab/56a405f6572c4a379def639d9d0debf2/FLAG70d443915 [2022-01-10 18:25:40,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/038ffc3ab/56a405f6572c4a379def639d9d0debf2 [2022-01-10 18:25:40,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:25:40,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:25:40,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:25:40,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:25:40,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:25:40,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549bf409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40, skipping insertion in model container [2022-01-10 18:25:40,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:25:40,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:25:40,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_rec.c[525,538] [2022-01-10 18:25:40,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:25:40,397 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:25:40,407 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_rec.c[525,538] [2022-01-10 18:25:40,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:25:40,432 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:25:40,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40 WrapperNode [2022-01-10 18:25:40,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:25:40,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:25:40,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:25:40,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:25:40,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,477 INFO L137 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 87 [2022-01-10 18:25:40,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:25:40,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:25:40,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:25:40,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:25:40,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:25:40,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:25:40,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:25:40,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:25:40,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:40,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:25:40,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:25:40,530 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 18:25:40,535 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 18:25:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:25:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:25:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-01-10 18:25:40,561 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-01-10 18:25:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 18:25:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 18:25:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-01-10 18:25:40,562 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-01-10 18:25:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:25:40,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:25:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 18:25:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 18:25:40,625 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:25:40,627 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:25:40,815 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:25:40,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:25:40,823 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 18:25:40,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:40 BoogieIcfgContainer [2022-01-10 18:25:40,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:25:40,825 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:25:40,826 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:25:40,827 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:25:40,829 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:40" (1/1) ... [2022-01-10 18:25:41,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:25:41 BasicIcfg [2022-01-10 18:25:41,051 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:25:41,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:25:41,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:25:41,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:25:41,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:25:40" (1/4) ... [2022-01-10 18:25:41,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a5934e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:25:41, skipping insertion in model container [2022-01-10 18:25:41,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:25:40" (2/4) ... [2022-01-10 18:25:41,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a5934e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:25:41, skipping insertion in model container [2022-01-10 18:25:41,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:25:40" (3/4) ... [2022-01-10 18:25:41,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a5934e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:25:41, skipping insertion in model container [2022-01-10 18:25:41,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:25:41" (4/4) ... [2022-01-10 18:25:41,065 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.cTransformedIcfg [2022-01-10 18:25:41,069 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:25:41,069 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:25:41,120 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:25:41,128 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 18:25:41,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:25:41,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 32 states have (on average 1.4375) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 18:25:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 18:25:41,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:25:41,149 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] [2022-01-10 18:25:41,150 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:25:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:25:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash 738488643, now seen corresponding path program 1 times [2022-01-10 18:25:41,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:25:41,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158568110] [2022-01-10 18:25:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:41,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:25:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:41,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 18:25:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:41,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:25:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:41,537 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 18:25:41,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:25:41,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158568110] [2022-01-10 18:25:41,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158568110] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:25:41,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:25:41,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 18:25:41,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362026365] [2022-01-10 18:25:41,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:25:41,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 18:25:41,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:25:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 18:25:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 18:25:41,582 INFO L87 Difference]: Start difference. First operand has 42 states, 32 states have (on average 1.4375) internal successors, (46), 35 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:25:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:25:41,693 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2022-01-10 18:25:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 18:25:41,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-10 18:25:41,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:25:41,701 INFO L225 Difference]: With dead ends: 82 [2022-01-10 18:25:41,701 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 18:25:41,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:25:41,706 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:25:41,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 83 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:25:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 18:25:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-01-10 18:25:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 18:25:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-01-10 18:25:41,732 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 30 [2022-01-10 18:25:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:25:41,733 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-01-10 18:25:41,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:25:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-01-10 18:25:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 18:25:41,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:25:41,735 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] [2022-01-10 18:25:41,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:25:41,735 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:25:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:25:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1759536386, now seen corresponding path program 1 times [2022-01-10 18:25:41,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:25:41,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242507645] [2022-01-10 18:25:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:41,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:25:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:42,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 18:25:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:42,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:25:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:42,098 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 18:25:42,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:25:42,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242507645] [2022-01-10 18:25:42,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242507645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:25:42,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:25:42,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 18:25:42,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758916870] [2022-01-10 18:25:42,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:25:42,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 18:25:42,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:25:42,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 18:25:42,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 18:25:42,102 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:25:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:25:42,453 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2022-01-10 18:25:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:25:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-10 18:25:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:25:42,455 INFO L225 Difference]: With dead ends: 73 [2022-01-10 18:25:42,455 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 18:25:42,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-10 18:25:42,457 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:25:42,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 187 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:25:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 18:25:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-10 18:25:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 18:25:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-01-10 18:25:42,466 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 30 [2022-01-10 18:25:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:25:42,467 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-01-10 18:25:42,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:25:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-01-10 18:25:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 18:25:42,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:25:42,468 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] [2022-01-10 18:25:42,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:25:42,469 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:25:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:25:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash -319190433, now seen corresponding path program 1 times [2022-01-10 18:25:42,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:25:42,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789864468] [2022-01-10 18:25:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:42,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:25:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:42,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:25:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:42,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-10 18:25:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:25:42,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:25:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789864468] [2022-01-10 18:25:42,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789864468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:25:42,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:25:42,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 18:25:42,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319593545] [2022-01-10 18:25:42,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:25:42,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 18:25:42,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:25:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 18:25:42,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:25:42,709 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:25:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:25:42,826 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-01-10 18:25:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 18:25:42,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-01-10 18:25:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:25:42,828 INFO L225 Difference]: With dead ends: 65 [2022-01-10 18:25:42,828 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 18:25:42,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:25:42,829 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:25:42,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 128 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:25:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 18:25:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-01-10 18:25:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 18:25:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-01-10 18:25:42,838 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 31 [2022-01-10 18:25:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:25:42,839 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-01-10 18:25:42,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:25:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-01-10 18:25:42,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 18:25:42,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:25:42,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:25:42,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 18:25:42,843 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:25:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:25:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash -110806531, now seen corresponding path program 1 times [2022-01-10 18:25:42,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:25:42,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526472823] [2022-01-10 18:25:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:42,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:25:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-10 18:25:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:43,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 18:25:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:25:43,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:25:43,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526472823] [2022-01-10 18:25:43,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526472823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:25:43,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745490440] [2022-01-10 18:25:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:25:43,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:25:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:25:43,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:25:43,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:25:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:25:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-10 18:25:43,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:25:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:25:44,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:25:58,080 WARN L228 SmtUtils]: Spent 9.20s on a formula simplification. DAG size of input: 36 DAG size of output: 34 (called from [L 232] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-01-10 18:26:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:26:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745490440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:26:02,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:26:02,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 9] total 20 [2022-01-10 18:26:02,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668668131] [2022-01-10 18:26:02,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:26:02,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 18:26:02,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:26:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 18:26:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-01-10 18:26:02,607 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 18:26:05,668 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 18:26:07,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 18:26:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:26:07,965 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2022-01-10 18:26:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 18:26:07,966 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-01-10 18:26:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:26:07,968 INFO L225 Difference]: With dead ends: 91 [2022-01-10 18:26:07,968 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 18:26:07,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2022-01-10 18:26:07,969 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 178 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-10 18:26:07,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 286 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 208 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-01-10 18:26:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 18:26:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 42. [2022-01-10 18:26:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 35 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 18:26:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-01-10 18:26:07,980 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 33 [2022-01-10 18:26:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:26:07,980 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-01-10 18:26:07,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 18:26:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-01-10 18:26:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 18:26:07,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:26:07,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:26:07,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 18:26:08,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:26:08,182 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:26:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:26:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1717339621, now seen corresponding path program 2 times [2022-01-10 18:26:08,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:26:08,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742898896] [2022-01-10 18:26:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:26:08,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:26:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:08,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-10 18:26:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:08,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 18:26:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:26:08,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:26:08,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742898896] [2022-01-10 18:26:08,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742898896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:26:08,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202809237] [2022-01-10 18:26:08,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:26:08,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:26:08,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:26:08,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:26:08,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:26:09,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 18:26:09,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:26:09,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 18:26:09,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:26:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 18:26:10,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:26:10,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202809237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:26:10,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:26:10,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-01-10 18:26:10,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015434124] [2022-01-10 18:26:10,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:26:10,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:26:10,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:26:10,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:26:10,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:26:10,629 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:26:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:26:10,765 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-01-10 18:26:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 18:26:10,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-01-10 18:26:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:26:10,770 INFO L225 Difference]: With dead ends: 74 [2022-01-10 18:26:10,770 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 18:26:10,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-10 18:26:10,771 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:26:10,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 150 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2022-01-10 18:26:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 18:26:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-10 18:26:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 18:26:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-01-10 18:26:10,783 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 35 [2022-01-10 18:26:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:26:10,784 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-01-10 18:26:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:26:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-01-10 18:26:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 18:26:10,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:26:10,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:26:10,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:26:10,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:26:10,986 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:26:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:26:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1313272582, now seen corresponding path program 1 times [2022-01-10 18:26:10,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:26:10,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990730471] [2022-01-10 18:26:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:26:10,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:26:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:11,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:26:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:11,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 18:26:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 18:26:11,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:26:11,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990730471] [2022-01-10 18:26:11,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990730471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:26:11,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580399198] [2022-01-10 18:26:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:26:11,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:26:11,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:26:11,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:26:11,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:26:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 18:26:11,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:26:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 18:26:12,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:26:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 18:26:12,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580399198] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 18:26:12,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 18:26:12,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2022-01-10 18:26:12,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124294714] [2022-01-10 18:26:12,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:26:12,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:26:12,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:26:12,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:26:12,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 18:26:12,591 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:26:12,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:26:12,689 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2022-01-10 18:26:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:26:12,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-01-10 18:26:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:26:12,691 INFO L225 Difference]: With dead ends: 73 [2022-01-10 18:26:12,691 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 18:26:12,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-10 18:26:12,692 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:26:12,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 132 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:26:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 18:26:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-10 18:26:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 18:26:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-01-10 18:26:12,707 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 36 [2022-01-10 18:26:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:26:12,708 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-01-10 18:26:12,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 18:26:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-01-10 18:26:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 18:26:12,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:26:12,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:26:12,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 18:26:12,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:26:12,937 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:26:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:26:12,938 INFO L85 PathProgramCache]: Analyzing trace with hash 509674746, now seen corresponding path program 1 times [2022-01-10 18:26:12,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:26:12,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204590789] [2022-01-10 18:26:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:26:12,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:26:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:13,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:26:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:13,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-10 18:26:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 18:26:13,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:26:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204590789] [2022-01-10 18:26:13,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204590789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:26:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895740310] [2022-01-10 18:26:13,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:26:13,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:26:13,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:26:13,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:26:13,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:26:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:14,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 18:26:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:26:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 18:26:15,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:26:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 18:26:15,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895740310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:26:15,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:26:15,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-01-10 18:26:15,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099464065] [2022-01-10 18:26:15,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:26:15,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 18:26:15,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:26:15,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 18:26:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:26:15,720 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 18:26:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:26:16,662 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2022-01-10 18:26:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 18:26:16,664 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-01-10 18:26:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:26:16,665 INFO L225 Difference]: With dead ends: 85 [2022-01-10 18:26:16,665 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 18:26:16,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-01-10 18:26:16,667 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 60 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 18:26:16,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 399 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 21 Unchecked, 0.5s Time] [2022-01-10 18:26:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 18:26:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2022-01-10 18:26:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 18:26:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-10 18:26:16,681 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 37 [2022-01-10 18:26:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:26:16,681 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-10 18:26:16,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 18:26:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-10 18:26:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 18:26:16,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:26:16,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:26:16,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 18:26:16,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:26:16,887 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:26:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:26:16,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2023924711, now seen corresponding path program 2 times [2022-01-10 18:26:16,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:26:16,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69908237] [2022-01-10 18:26:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:26:16,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:26:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:17,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-10 18:26:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:17,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-10 18:26:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:26:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 18:26:17,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:26:17,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69908237] [2022-01-10 18:26:17,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69908237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:26:17,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648406522] [2022-01-10 18:26:17,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:26:17,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:26:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:26:17,132 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:26:17,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:26:18,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 18:26:18,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:26:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 79 conjunts are in the unsatisfiable core [2022-01-10 18:26:18,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:26:26,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-01-10 18:26:28,257 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_247 Int)) (= (store |c_old(#memory_intInt)| |c_downsweep_downsweep_#in~a.baseInt| (let ((.cse0 (select |c_old(#memory_intInt)| |c_downsweep_downsweep_#in~a.baseInt|)) (.cse1 (mod (+ |c_downsweep_downsweep_#in~a.offsetInt| (mod (+ (* 18446744056529682432 (mod (div |c_downsweep_downsweep_#in~rightInt| 2147483648) 2)) (* |c_downsweep_downsweep_#in~rightInt| 4)) 18446744073709551616)) 18446744073709551616))) (store (store .cse0 .cse1 v_ArrVal_247) (mod (+ |c_downsweep_downsweep_#in~a.offsetInt| (mod (+ (* 4 |c_downsweep_downsweep_#in~leftInt|) (* (mod (div |c_downsweep_downsweep_#in~leftInt| 2147483648) 2) 18446744056529682432)) 18446744073709551616)) 18446744073709551616) (select .cse0 .cse1)))) |c_#memory_intInt|)) is different from true [2022-01-10 18:26:28,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 18:26:28,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 58 [2022-01-10 18:26:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 18:26:30,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 18:26:30,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 23 [2022-01-10 18:26:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 18:26:31,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:26:31,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648406522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:26:31,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:26:31,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8] total 20 [2022-01-10 18:26:31,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535774596] [2022-01-10 18:26:31,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:26:31,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 18:26:31,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:26:31,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 18:26:31,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=291, Unknown=1, NotChecked=34, Total=380 [2022-01-10 18:26:31,326 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 18:26:48,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 18:26:50,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []