/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_SUM.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:07:17,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:07:17,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:07:17,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 02:07:17,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 02:07:17,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 02:07:17,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 02:07:17,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 02:07:17,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 02:07:17,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 02:07:17,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 02:07:17,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 02:07:17,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:07:17,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:07:17,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:07:17,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:07:17,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:07:17,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:07:17,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:07:17,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:07:17,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:07:17,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:07:17,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:07:17,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:07:17,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 02:07:17,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 02:07:17,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 02:07:17,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 02:07:17,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 02:07:17,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 02:07:17,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 02:07:17,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 02:07:17,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 02:07:17,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:07:17,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:07:17,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:07:17,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 02:07:17,603 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:07:17,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:07:17,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:07:17,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:07:17,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:07:17,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:07:17,605 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:07:17,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:07:17,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:07:17,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:07:17,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:07:17,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:07:17,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:07:17,606 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:07:17,606 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:07:17,606 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:07:17,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:07:17,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:07:17,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:07:17,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:07:17,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:07:17,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:07:17,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:07:17,608 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:07:17,609 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:07:17,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:07:17,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:07:17,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:07:17,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:07:17,803 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:07:17,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-01-11 02:07:17,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58ca45f6/92c9f678202a4c4ca783e71011165e4b/FLAGce18dfe26 [2022-01-11 02:07:18,177 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:07:18,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-01-11 02:07:18,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58ca45f6/92c9f678202a4c4ca783e71011165e4b/FLAGce18dfe26 [2022-01-11 02:07:18,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b58ca45f6/92c9f678202a4c4ca783e71011165e4b [2022-01-11 02:07:18,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:07:18,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:07:18,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:07:18,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:07:18,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:07:18,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38462e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18, skipping insertion in model container [2022-01-11 02:07:18,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:07:18,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:07:18,352 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2022-01-11 02:07:18,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:07:18,368 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:07:18,378 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2022-01-11 02:07:18,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:07:18,388 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:07:18,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18 WrapperNode [2022-01-11 02:07:18,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:07:18,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:07:18,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:07:18,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:07:18,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,417 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2022-01-11 02:07:18,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:07:18,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:07:18,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:07:18,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:07:18,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:07:18,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:07:18,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:07:18,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:07:18,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:07:18,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:18,455 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) [2022-01-11 02:07:18,457 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 [2022-01-11 02:07:18,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:07:18,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:07:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:07:18,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:07:18,524 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:07:18,525 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:07:18,582 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:07:18,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:07:18,585 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-11 02:07:18,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:07:18 BoogieIcfgContainer [2022-01-11 02:07:18,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:07:18,587 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:07:18,587 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:07:18,588 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:07:18,590 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:07:18" (1/1) ... [2022-01-11 02:07:18,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:07:18 BasicIcfg [2022-01-11 02:07:18,645 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:07:18,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:07:18,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:07:18,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:07:18,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:07:18" (1/4) ... [2022-01-11 02:07:18,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55347fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:07:18, skipping insertion in model container [2022-01-11 02:07:18,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:07:18" (2/4) ... [2022-01-11 02:07:18,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55347fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:07:18, skipping insertion in model container [2022-01-11 02:07:18,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:07:18" (3/4) ... [2022-01-11 02:07:18,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55347fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:07:18, skipping insertion in model container [2022-01-11 02:07:18,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:07:18" (4/4) ... [2022-01-11 02:07:18,667 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.cTransformedIcfg [2022-01-11 02:07:18,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:07:18,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 02:07:18,714 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:07:18,718 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 [2022-01-11 02:07:18,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 02:07:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-11 02:07:18,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:18,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-11 02:07:18,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:18,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:18,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1923912807, now seen corresponding path program 1 times [2022-01-11 02:07:18,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:18,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005775965] [2022-01-11 02:07:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:18,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:18,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005775965] [2022-01-11 02:07:18,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005775965] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:07:18,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:07:18,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:07:18,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863804311] [2022-01-11 02:07:18,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:07:18,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:07:18,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:18,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:07:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:07:18,929 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:18,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:18,939 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-01-11 02:07:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:07:18,940 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-11 02:07:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:18,946 INFO L225 Difference]: With dead ends: 20 [2022-01-11 02:07:18,946 INFO L226 Difference]: Without dead ends: 8 [2022-01-11 02:07:18,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:07:18,953 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:18,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:07:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-01-11 02:07:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-01-11 02:07:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-01-11 02:07:18,982 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-01-11 02:07:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:18,983 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-01-11 02:07:18,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-01-11 02:07:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-11 02:07:18,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:18,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-11 02:07:18,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:07:18,985 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:18,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1923942598, now seen corresponding path program 1 times [2022-01-11 02:07:18,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:18,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948270879] [2022-01-11 02:07:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:18,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:19,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948270879] [2022-01-11 02:07:19,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948270879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:07:19,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:07:19,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 02:07:19,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277966653] [2022-01-11 02:07:19,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:07:19,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 02:07:19,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 02:07:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 02:07:19,086 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:19,107 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-01-11 02:07:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:07:19,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-11 02:07:19,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:19,108 INFO L225 Difference]: With dead ends: 16 [2022-01-11 02:07:19,108 INFO L226 Difference]: Without dead ends: 10 [2022-01-11 02:07:19,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 02:07:19,109 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:19,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:07:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-01-11 02:07:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-01-11 02:07:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-01-11 02:07:19,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-01-11 02:07:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:19,112 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-01-11 02:07:19,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-01-11 02:07:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-11 02:07:19,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:19,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:19,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:07:19,113 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2102299688, now seen corresponding path program 1 times [2022-01-11 02:07:19,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:19,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324755580] [2022-01-11 02:07:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:19,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:19,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:19,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324755580] [2022-01-11 02:07:19,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324755580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:19,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360479594] [2022-01-11 02:07:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:19,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:19,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:19,192 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) [2022-01-11 02:07:19,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 02:07:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:19,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-11 02:07:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:19,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:07:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:19,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360479594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:07:19,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:07:19,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-11 02:07:19,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035325141] [2022-01-11 02:07:19,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:07:19,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-11 02:07:19,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:19,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-11 02:07:19,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-11 02:07:19,597 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:19,695 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2022-01-11 02:07:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 02:07:19,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-11 02:07:19,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:19,696 INFO L225 Difference]: With dead ends: 26 [2022-01-11 02:07:19,696 INFO L226 Difference]: Without dead ends: 16 [2022-01-11 02:07:19,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-01-11 02:07:19,698 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:19,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:07:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-11 02:07:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-11 02:07:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-01-11 02:07:19,701 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2022-01-11 02:07:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:19,701 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-01-11 02:07:19,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-01-11 02:07:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-11 02:07:19,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:19,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:19,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 02:07:19,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:19,904 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1367323470, now seen corresponding path program 2 times [2022-01-11 02:07:19,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:19,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788179956] [2022-01-11 02:07:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:19,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:20,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:20,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788179956] [2022-01-11 02:07:20,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788179956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:20,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048899657] [2022-01-11 02:07:20,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:07:20,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:20,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:20,008 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) [2022-01-11 02:07:20,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 02:07:20,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-11 02:07:20,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:07:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-11 02:07:20,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 02:07:20,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:07:20,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048899657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:07:20,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 02:07:20,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2022-01-11 02:07:20,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495921664] [2022-01-11 02:07:20,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:07:20,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 02:07:20,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 02:07:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-11 02:07:20,149 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:20,172 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-01-11 02:07:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 02:07:20,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-11 02:07:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:20,174 INFO L225 Difference]: With dead ends: 26 [2022-01-11 02:07:20,174 INFO L226 Difference]: Without dead ends: 22 [2022-01-11 02:07:20,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-11 02:07:20,175 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:20,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:07:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-11 02:07:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-11 02:07:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-01-11 02:07:20,179 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 14 [2022-01-11 02:07:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:20,180 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-01-11 02:07:20,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-01-11 02:07:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 02:07:20,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:20,180 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:20,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-11 02:07:20,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-11 02:07:20,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:20,398 INFO L85 PathProgramCache]: Analyzing trace with hash -231814095, now seen corresponding path program 1 times [2022-01-11 02:07:20,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:20,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419213006] [2022-01-11 02:07:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:20,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:20,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:20,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419213006] [2022-01-11 02:07:20,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419213006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085504329] [2022-01-11 02:07:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:20,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:20,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:20,515 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) [2022-01-11 02:07:20,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 02:07:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-11 02:07:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:33,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:07:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:33,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085504329] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:07:33,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:07:33,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-01-11 02:07:33,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290984294] [2022-01-11 02:07:33,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:07:33,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 02:07:33,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:33,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 02:07:33,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=321, Unknown=6, NotChecked=0, Total=420 [2022-01-11 02:07:33,685 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:34,463 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2022-01-11 02:07:34,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 02:07:34,464 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-11 02:07:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:34,464 INFO L225 Difference]: With dead ends: 54 [2022-01-11 02:07:34,464 INFO L226 Difference]: Without dead ends: 36 [2022-01-11 02:07:34,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=170, Invalid=580, Unknown=6, NotChecked=0, Total=756 [2022-01-11 02:07:34,465 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:34,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 77 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2022-01-11 02:07:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-11 02:07:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-11 02:07:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-01-11 02:07:34,469 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 16 [2022-01-11 02:07:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:34,470 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-01-11 02:07:34,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-01-11 02:07:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-11 02:07:34,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:34,470 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:34,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-11 02:07:34,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:34,686 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:34,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:34,686 INFO L85 PathProgramCache]: Analyzing trace with hash -632022117, now seen corresponding path program 2 times [2022-01-11 02:07:34,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:34,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937732502] [2022-01-11 02:07:34,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:34,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:07:34,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937732502] [2022-01-11 02:07:34,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937732502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:34,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908379892] [2022-01-11 02:07:34,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:07:34,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:34,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:34,850 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) [2022-01-11 02:07:34,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 02:07:34,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:07:34,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:07:34,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-11 02:07:34,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 02:07:35,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:07:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 02:07:35,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908379892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:07:35,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:07:35,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2022-01-11 02:07:35,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604445074] [2022-01-11 02:07:35,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:07:35,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 02:07:35,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 02:07:35,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-01-11 02:07:35,215 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:36,042 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2022-01-11 02:07:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-11 02:07:36,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-11 02:07:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:36,045 INFO L225 Difference]: With dead ends: 68 [2022-01-11 02:07:36,045 INFO L226 Difference]: Without dead ends: 46 [2022-01-11 02:07:36,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2022-01-11 02:07:36,046 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 68 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:36,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 49 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 02:07:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-11 02:07:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-11 02:07:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-01-11 02:07:36,051 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 26 [2022-01-11 02:07:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:36,051 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-01-11 02:07:36,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-01-11 02:07:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 02:07:36,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:36,052 INFO L514 BasicCegarLoop]: trace histogram [15, 11, 4, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:36,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 02:07:36,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:36,253 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:36,253 INFO L85 PathProgramCache]: Analyzing trace with hash 807668616, now seen corresponding path program 3 times [2022-01-11 02:07:36,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:36,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384167965] [2022-01-11 02:07:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:36,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 132 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 02:07:36,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:36,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384167965] [2022-01-11 02:07:36,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384167965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:36,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909761790] [2022-01-11 02:07:36,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 02:07:36,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:36,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:36,511 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) [2022-01-11 02:07:36,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 02:07:36,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-11 02:07:36,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:07:36,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-11 02:07:36,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-11 02:07:36,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:07:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-11 02:07:37,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909761790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:07:37,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:07:37,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2022-01-11 02:07:37,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642230331] [2022-01-11 02:07:37,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:07:37,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-11 02:07:37,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:07:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-11 02:07:37,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-01-11 02:07:37,850 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:52,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 02:07:56,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:07:56,883 INFO L93 Difference]: Finished difference Result 123 states and 176 transitions. [2022-01-11 02:07:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-11 02:07:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-11 02:07:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:07:56,885 INFO L225 Difference]: With dead ends: 123 [2022-01-11 02:07:56,885 INFO L226 Difference]: Without dead ends: 91 [2022-01-11 02:07:56,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=668, Invalid=2872, Unknown=0, NotChecked=0, Total=3540 [2022-01-11 02:07:56,886 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 148 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-11 02:07:56,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 31 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-11 02:07:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-11 02:07:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2022-01-11 02:07:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 72 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-01-11 02:07:56,896 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 36 [2022-01-11 02:07:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:07:56,896 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-01-11 02:07:56,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:07:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-01-11 02:07:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-11 02:07:56,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:07:56,897 INFO L514 BasicCegarLoop]: trace histogram [23, 13, 10, 1, 1, 1, 1, 1, 1] [2022-01-11 02:07:56,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 02:07:57,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:57,098 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:07:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:07:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash -543204386, now seen corresponding path program 4 times [2022-01-11 02:07:57,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:07:57,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127990848] [2022-01-11 02:07:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:07:57,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:07:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:07:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-11 02:07:57,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:07:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127990848] [2022-01-11 02:07:57,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127990848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:07:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539599943] [2022-01-11 02:07:57,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 02:07:57,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:07:57,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:07:57,415 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:07:57,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 02:07:59,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 02:07:59,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:07:59,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-11 02:07:59,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:07:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-11 02:07:59,582 INFO L328 TraceCheckSpWp]: Computing backward predicates...