/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/loop-simple/nested_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:12:09,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:12:09,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:12:09,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 02:12:09,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 02:12:09,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 02:12:09,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 02:12:09,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 02:12:09,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 02:12:09,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 02:12:09,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 02:12:09,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 02:12:09,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:12:09,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:12:09,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:12:09,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:12:09,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:12:09,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:12:09,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:12:09,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:12:09,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:12:09,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:12:09,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:12:09,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:12:09,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 02:12:09,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 02:12:09,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 02:12:09,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 02:12:09,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 02:12:09,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 02:12:09,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 02:12:09,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 02:12:09,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 02:12:09,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 02:12:09,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 02:12:09,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 02:12:09,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 02:12:09,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 02:12:09,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:12:09,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:12:09,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:12:09,526 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 02:12:09,549 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:12:09,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:12:09,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:12:09,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:12:09,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:12:09,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:12:09,551 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:12:09,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:12:09,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:12:09,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:12:09,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:12:09,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:12:09,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:12:09,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:12:09,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:12:09,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:12:09,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:12:09,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:12:09,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:12:09,553 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:12:09,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:12:09,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:12:09,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:12:09,554 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:12:09,554 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:12:09,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:12:09,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:12:09,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:12:09,753 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:12:09,754 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:12:09,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_2.c [2022-01-11 02:12:09,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8661c89/b0f4ea69d7e048c788b847385b1e5db8/FLAG0fc8f2e2d [2022-01-11 02:12:10,170 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:12:10,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_2.c [2022-01-11 02:12:10,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8661c89/b0f4ea69d7e048c788b847385b1e5db8/FLAG0fc8f2e2d [2022-01-11 02:12:10,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8661c89/b0f4ea69d7e048c788b847385b1e5db8 [2022-01-11 02:12:10,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:12:10,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:12:10,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:12:10,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:12:10,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:12:10,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c183c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10, skipping insertion in model container [2022-01-11 02:12:10,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:12:10,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:12:10,373 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_2.c[730,743] [2022-01-11 02:12:10,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:12:10,392 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:12:10,404 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_2.c[730,743] [2022-01-11 02:12:10,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:12:10,417 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:12:10,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10 WrapperNode [2022-01-11 02:12:10,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:12:10,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:12:10,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:12:10,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:12:10,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,442 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-01-11 02:12:10,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:12:10,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:12:10,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:12:10,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:12:10,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:12:10,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:12:10,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:12:10,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:12:10,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:12:10,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:10,495 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 02:12:10,523 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 02:12:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:12:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:12:10,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:12:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:12:10,593 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:12:10,594 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:12:10,707 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:12:10,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:12:10,711 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-11 02:12:10,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:12:10 BoogieIcfgContainer [2022-01-11 02:12:10,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:12:10,713 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:12:10,713 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:12:10,714 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:12:10,716 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:12:10" (1/1) ... [2022-01-11 02:12:10,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:12:10 BasicIcfg [2022-01-11 02:12:10,770 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:12:10,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:12:10,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:12:10,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:12:10,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:12:10" (1/4) ... [2022-01-11 02:12:10,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f09c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:12:10, skipping insertion in model container [2022-01-11 02:12:10,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:12:10" (2/4) ... [2022-01-11 02:12:10,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f09c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:12:10, skipping insertion in model container [2022-01-11 02:12:10,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:12:10" (3/4) ... [2022-01-11 02:12:10,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f09c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:12:10, skipping insertion in model container [2022-01-11 02:12:10,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:12:10" (4/4) ... [2022-01-11 02:12:10,775 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.cTransformedIcfg [2022-01-11 02:12:10,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:12:10,779 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 02:12:10,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:12:10,813 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 02:12:10,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 02:12:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 02:12:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-11 02:12:10,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:10,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-11 02:12:10,839 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash 66833229, now seen corresponding path program 1 times [2022-01-11 02:12:10,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:10,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924240137] [2022-01-11 02:12:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:10,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:10,972 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 02:12:10,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924240137] [2022-01-11 02:12:10,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924240137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:12:10,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:12:10,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:12:10,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955696583] [2022-01-11 02:12:10,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:12:10,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:12:10,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:12:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:12:11,006 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 02:12:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:11,015 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2022-01-11 02:12:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:12:11,017 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-01-11 02:12:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:11,021 INFO L225 Difference]: With dead ends: 24 [2022-01-11 02:12:11,022 INFO L226 Difference]: Without dead ends: 9 [2022-01-11 02:12:11,023 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 02:12:11,027 INFO L933 BasicCegarLoop]: 14 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, 14 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 02:12:11,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:12:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-01-11 02:12:11,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-01-11 02:12:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 02:12:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-01-11 02:12:11,051 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2022-01-11 02:12:11,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:11,052 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-01-11 02:12:11,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 02:12:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-01-11 02:12:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-11 02:12:11,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:11,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-11 02:12:11,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:12:11,055 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash 66834190, now seen corresponding path program 1 times [2022-01-11 02:12:11,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:11,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487545159] [2022-01-11 02:12:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:11,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:11,131 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 02:12:11,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:11,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487545159] [2022-01-11 02:12:11,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487545159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:12:11,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:12:11,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:12:11,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952244027] [2022-01-11 02:12:11,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:12:11,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:12:11,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:11,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:12:11,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:11,134 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 02:12:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:11,158 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-01-11 02:12:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:12:11,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-01-11 02:12:11,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:11,159 INFO L225 Difference]: With dead ends: 16 [2022-01-11 02:12:11,159 INFO L226 Difference]: Without dead ends: 13 [2022-01-11 02:12:11,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:11,160 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:11,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:12:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-11 02:12:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2022-01-11 02:12:11,162 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 02:12:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-01-11 02:12:11,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2022-01-11 02:12:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:11,163 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-01-11 02:12:11,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 02:12:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-01-11 02:12:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-11 02:12:11,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:11,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:12:11,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:12:11,164 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:11,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1775939199, now seen corresponding path program 1 times [2022-01-11 02:12:11,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:11,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553342814] [2022-01-11 02:12:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:11,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:11,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:11,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553342814] [2022-01-11 02:12:11,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553342814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:12:11,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:12:11,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:12:11,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603005] [2022-01-11 02:12:11,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:12:11,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:12:11,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:12:11,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:11,237 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 02:12:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:11,249 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-01-11 02:12:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:12:11,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 8 [2022-01-11 02:12:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:11,250 INFO L225 Difference]: With dead ends: 19 [2022-01-11 02:12:11,250 INFO L226 Difference]: Without dead ends: 12 [2022-01-11 02:12:11,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:12:11,251 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:11,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:12:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-11 02:12:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-01-11 02:12:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 02:12:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-01-11 02:12:11,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-01-11 02:12:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:11,254 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-01-11 02:12:11,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 02:12:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-01-11 02:12:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 02:12:11,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:11,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:12:11,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 02:12:11,255 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:11,256 INFO L85 PathProgramCache]: Analyzing trace with hash -654570244, now seen corresponding path program 1 times [2022-01-11 02:12:11,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:11,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840860330] [2022-01-11 02:12:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:11,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:11,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840860330] [2022-01-11 02:12:11,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840860330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:12:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78546499] [2022-01-11 02:12:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:11,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:12:11,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:11,335 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 02:12:11,347 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 02:12:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:11,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-11 02:12:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:12:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:11,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:12:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:12:11,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78546499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:12:11,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:12:11,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-11 02:12:11,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717148559] [2022-01-11 02:12:11,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:12:11,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 02:12:11,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:11,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 02:12:11,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-11 02:12:11,654 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 02:12:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:11,723 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-01-11 02:12:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 02:12:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 10 [2022-01-11 02:12:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:11,724 INFO L225 Difference]: With dead ends: 25 [2022-01-11 02:12:11,724 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 02:12:11,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-11 02:12:11,725 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:11,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:12:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 02:12:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 02:12:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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 02:12:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-01-11 02:12:11,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2022-01-11 02:12:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:11,730 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-01-11 02:12:11,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 02:12:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-01-11 02:12:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 02:12:11,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:11,730 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:12:11,753 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 02:12:11,935 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 [2022-01-11 02:12:11,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -585806099, now seen corresponding path program 2 times [2022-01-11 02:12:11,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:11,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700108818] [2022-01-11 02:12:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:11,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 02:12:12,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:12,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700108818] [2022-01-11 02:12:12,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700108818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:12:12,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200771295] [2022-01-11 02:12:12,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:12:12,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:12:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:12,047 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 02:12:12,063 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 02:12:12,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:12:12,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:12:12,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-11 02:12:12,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:12:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 02:12:12,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:12:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 02:12:12,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200771295] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:12:12,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:12:12,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2022-01-11 02:12:12,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129840372] [2022-01-11 02:12:12,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:12:12,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-11 02:12:12,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-11 02:12:12,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-01-11 02:12:12,498 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 02:12:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:12,720 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-01-11 02:12:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 02:12:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 02:12:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:12,722 INFO L225 Difference]: With dead ends: 53 [2022-01-11 02:12:12,722 INFO L226 Difference]: Without dead ends: 50 [2022-01-11 02:12:12,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-11 02:12:12,723 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:12,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 22 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:12:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-11 02:12:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-11 02:12:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 02:12:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-01-11 02:12:12,731 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 16 [2022-01-11 02:12:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:12,732 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-01-11 02:12:12,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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 02:12:12,732 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-01-11 02:12:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-11 02:12:12,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:12,733 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-11 02:12:12,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 02:12:12,933 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 [2022-01-11 02:12:12,934 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash 448296014, now seen corresponding path program 3 times [2022-01-11 02:12:12,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:12,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450381742] [2022-01-11 02:12:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:12,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 127 proven. 16 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-01-11 02:12:13,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:13,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450381742] [2022-01-11 02:12:13,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450381742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:12:13,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826861286] [2022-01-11 02:12:13,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 02:12:13,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:12:13,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:13,076 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 02:12:13,077 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 02:12:13,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-11 02:12:13,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:12:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 02:12:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:12:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 121 proven. 50 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-11 02:12:13,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:12:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-01-11 02:12:14,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826861286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:12:14,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:12:14,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-01-11 02:12:14,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100831491] [2022-01-11 02:12:14,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:12:14,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-11 02:12:14,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:14,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-11 02:12:14,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-01-11 02:12:14,572 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 02:12:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:14,772 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-01-11 02:12:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 02:12:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 49 [2022-01-11 02:12:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:14,774 INFO L225 Difference]: With dead ends: 104 [2022-01-11 02:12:14,774 INFO L226 Difference]: Without dead ends: 66 [2022-01-11 02:12:14,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-01-11 02:12:14,776 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:14,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-01-11 02:12:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-11 02:12:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-01-11 02:12:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 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 02:12:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-01-11 02:12:14,789 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 49 [2022-01-11 02:12:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:14,789 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-01-11 02:12:14,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 02:12:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-01-11 02:12:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-11 02:12:14,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:14,791 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-11 02:12:14,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 02:12:14,995 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 [2022-01-11 02:12:14,995 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:14,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:14,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1932096050, now seen corresponding path program 4 times [2022-01-11 02:12:14,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:14,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206418373] [2022-01-11 02:12:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:14,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-11 02:12:15,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206418373] [2022-01-11 02:12:15,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206418373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:12:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021852091] [2022-01-11 02:12:15,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 02:12:15,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:12:15,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:15,177 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 02:12:15,178 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 02:12:15,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 02:12:15,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:12:15,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-11 02:12:15,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:12:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 598 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-11 02:12:25,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:12:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 18 proven. 542 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-01-11 02:12:29,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021852091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:12:29,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:12:29,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16, 12] total 30 [2022-01-11 02:12:29,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32459577] [2022-01-11 02:12:29,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:12:29,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-11 02:12:29,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:12:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-11 02:12:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=624, Unknown=1, NotChecked=0, Total=870 [2022-01-11 02:12:29,465 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 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 02:12:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:12:30,147 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-01-11 02:12:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-11 02:12:30,148 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-11 02:12:30,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:12:30,149 INFO L225 Difference]: With dead ends: 99 [2022-01-11 02:12:30,149 INFO L226 Difference]: Without dead ends: 96 [2022-01-11 02:12:30,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=245, Invalid=624, Unknown=1, NotChecked=0, Total=870 [2022-01-11 02:12:30,150 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-11 02:12:30,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 56 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2022-01-11 02:12:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-11 02:12:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-01-11 02:12:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 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 02:12:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2022-01-11 02:12:30,165 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 65 [2022-01-11 02:12:30,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:12:30,165 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2022-01-11 02:12:30,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 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 02:12:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2022-01-11 02:12:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-11 02:12:30,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:12:30,167 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2022-01-11 02:12:30,185 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 02:12:30,371 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 [2022-01-11 02:12:30,371 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:12:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:12:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1018802478, now seen corresponding path program 5 times [2022-01-11 02:12:30,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:12:30,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758066259] [2022-01-11 02:12:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:12:30,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:12:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:12:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 1347 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-01-11 02:12:30,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:12:30,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758066259] [2022-01-11 02:12:30,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758066259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:12:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317976463] [2022-01-11 02:12:30,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 02:12:30,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:12:30,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:12:30,897 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 02:12:30,897 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 02:12:42,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2022-01-11 02:12:42,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:12:42,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 93 conjunts are in the unsatisfiable core [2022-01-11 02:12:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates...