/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_NONE.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:10:48,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:10:48,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:10:48,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 00:10:48,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 00:10:48,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 00:10:48,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 00:10:48,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 00:10:48,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 00:10:48,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 00:10:48,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 00:10:48,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 00:10:48,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:10:48,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:10:48,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:10:48,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:10:48,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:10:48,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:10:48,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:10:48,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:10:48,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:10:48,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:10:48,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:10:48,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:10:48,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 00:10:48,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 00:10:48,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 00:10:48,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 00:10:48,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 00:10:48,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 00:10:48,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 00:10:48,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 00:10:48,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 00:10:48,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 00:10:48,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 00:10:48,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 00:10:48,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 00:10:48,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 00:10:48,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:10:48,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:10:48,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:10:48,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-11 00:10:48,488 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:10:48,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:10:48,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:10:48,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:10:48,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:10:48,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:10:48,490 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:10:48,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:10:48,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:10:48,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:10:48,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:10:48,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:10:48,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:10:48,490 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:10:48,491 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:10:48,491 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:10:48,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:10:48,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:10:48,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:10:48,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:10:48,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:10:48,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:10:48,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:10:48,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:10:48,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:10:48,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:10:48,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:10:48,492 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:10:48,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:10:48,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:10:48,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:10:48,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:10:48,493 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:10:48,493 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:10:48,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:10:48,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:10:48,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:10:48,661 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:10:48,663 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:10:48,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2022-01-11 00:10:48,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ceca31ee/a3ce79eb514b45a6b921f9f87998e3e2/FLAGd219fc80a [2022-01-11 00:10:49,090 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:10:49,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2022-01-11 00:10:49,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ceca31ee/a3ce79eb514b45a6b921f9f87998e3e2/FLAGd219fc80a [2022-01-11 00:10:49,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ceca31ee/a3ce79eb514b45a6b921f9f87998e3e2 [2022-01-11 00:10:49,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:10:49,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:10:49,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:10:49,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:10:49,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:10:49,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa0b343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49, skipping insertion in model container [2022-01-11 00:10:49,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:10:49,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:10:49,302 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c[745,758] [2022-01-11 00:10:49,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:10:49,318 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:10:49,329 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c[745,758] [2022-01-11 00:10:49,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:10:49,341 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:10:49,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49 WrapperNode [2022-01-11 00:10:49,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:10:49,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:10:49,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:10:49,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:10:49,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,364 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 00:10:49,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:10:49,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:10:49,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:10:49,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:10:49,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:10:49,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:10:49,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:10:49,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:10:49,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:10:49,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:10:49,409 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 00:10:49,426 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 00:10:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:10:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:10:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:10:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:10:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-11 00:10:49,437 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-11 00:10:49,480 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:10:49,481 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:10:49,561 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:10:49,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:10:49,573 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:10:49,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:10:49 BoogieIcfgContainer [2022-01-11 00:10:49,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:10:49,575 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:10:49,580 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:10:49,580 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:10:49,582 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:10:49" (1/1) ... [2022-01-11 00:10:49,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:10:49 BasicIcfg [2022-01-11 00:10:49,641 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:10:49,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:10:49,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:10:49,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:10:49,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:10:49" (1/4) ... [2022-01-11 00:10:49,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e714c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:10:49, skipping insertion in model container [2022-01-11 00:10:49,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:10:49" (2/4) ... [2022-01-11 00:10:49,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e714c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:10:49, skipping insertion in model container [2022-01-11 00:10:49,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:10:49" (3/4) ... [2022-01-11 00:10:49,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e714c7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:10:49, skipping insertion in model container [2022-01-11 00:10:49,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:10:49" (4/4) ... [2022-01-11 00:10:49,655 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_20-2.cTransformedIcfg [2022-01-11 00:10:49,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:10:49,659 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:10:49,685 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:10:49,689 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 00:10:49,689 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:10:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 00:10:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 00:10:49,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:49,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:49,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:49,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-11 00:10:49,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:49,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322278922] [2022-01-11 00:10:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:49,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:49,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:10:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:50,014 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 00:10:50,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:50,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322278922] [2022-01-11 00:10:50,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322278922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:10:50,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:10:50,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:10:50,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171576571] [2022-01-11 00:10:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:10:50,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:10:50,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:10:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:10:50,044 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:10:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:50,138 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-11 00:10:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:10:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-11 00:10:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:50,149 INFO L225 Difference]: With dead ends: 29 [2022-01-11 00:10:50,150 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 00:10:50,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 00:10:50,156 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:50,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:10:50,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 00:10:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 00:10:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:10:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:10:50,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 00:10:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:50,191 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:10:50,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:10:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:10:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:10:50,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:50,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:50,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:10:50,195 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-11 00:10:50,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:50,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139130459] [2022-01-11 00:10:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:50,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:50,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:10:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:50,281 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 00:10:50,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:50,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139130459] [2022-01-11 00:10:50,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139130459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:10:50,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:10:50,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:10:50,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891725026] [2022-01-11 00:10:50,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:10:50,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:10:50,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:10:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:10:50,284 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:10:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:50,317 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 00:10:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:10:50,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-11 00:10:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:50,318 INFO L225 Difference]: With dead ends: 23 [2022-01-11 00:10:50,319 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 00:10:50,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 00:10:50,320 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:50,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:10:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 00:10:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 00:10:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:10:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:10:50,325 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 00:10:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:50,325 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:10:50,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:10:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:10:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 00:10:50,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:50,326 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:50,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:10:50,326 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-11 00:10:50,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:50,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923942135] [2022-01-11 00:10:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:50,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:50,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:10:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:50,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:50,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:10:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:10:50,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:50,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923942135] [2022-01-11 00:10:50,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923942135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:10:50,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308958709] [2022-01-11 00:10:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:50,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:10:50,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:10:50,604 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 00:10:50,627 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 00:10:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:10:50,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:10:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:10:50,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:10:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:10:51,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308958709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:10:51,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:10:51,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-11 00:10:51,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086408580] [2022-01-11 00:10:51,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:10:51,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 00:10:51,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:51,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 00:10:51,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-11 00:10:51,804 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 00:10:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:52,489 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-11 00:10:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:10:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 22 [2022-01-11 00:10:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:52,492 INFO L225 Difference]: With dead ends: 46 [2022-01-11 00:10:52,492 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 00:10:52,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-11 00:10:52,494 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:52,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 00:10:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 00:10:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-11 00:10:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-11 00:10:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-11 00:10:52,501 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-11 00:10:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:52,501 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-11 00:10:52,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 00:10:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-11 00:10:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 00:10:52,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:52,503 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:52,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 00:10:52,703 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 00:10:52,704 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-11 00:10:52,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:52,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860116] [2022-01-11 00:10:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:52,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:52,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:10:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:52,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:52,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:52,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:10:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:52,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:10:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:10:52,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:52,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860116] [2022-01-11 00:10:52,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:10:52,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688754976] [2022-01-11 00:10:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:52,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:10:52,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:10:52,887 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 00:10:52,888 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 00:10:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:52,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:10:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:10:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 00:10:53,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:10:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:10:53,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688754976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:10:53,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:10:53,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-11 00:10:53,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143681525] [2022-01-11 00:10:53,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:10:53,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 00:10:53,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:53,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 00:10:53,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 00:10:53,351 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 00:10:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:53,473 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-11 00:10:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:10:53,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 36 [2022-01-11 00:10:53,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:53,475 INFO L225 Difference]: With dead ends: 43 [2022-01-11 00:10:53,475 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 00:10:53,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-11 00:10:53,476 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:53,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:10:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 00:10:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-11 00:10:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-11 00:10:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-11 00:10:53,488 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-11 00:10:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:53,489 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-11 00:10:53,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 00:10:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-11 00:10:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 00:10:53,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:53,490 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:53,509 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 00:10:53,691 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 00:10:53,691 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-11 00:10:53,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893504479] [2022-01-11 00:10:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:53,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:10:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:10:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:10:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:10:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:10:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:10:53,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:53,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893504479] [2022-01-11 00:10:53,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893504479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:10:53,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836551712] [2022-01-11 00:10:53,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:10:53,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:10:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:10:53,956 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 00:10:53,957 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 00:10:54,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:10:54,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:10:54,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:10:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:10:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 26 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-11 00:10:54,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:10:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:10:54,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836551712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:10:54,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:10:54,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-11 00:10:54,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192272332] [2022-01-11 00:10:54,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:10:54,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 00:10:54,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:54,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 00:10:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-11 00:10:54,652 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:10:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:54,903 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2022-01-11 00:10:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:10:54,904 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2022-01-11 00:10:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:54,905 INFO L225 Difference]: With dead ends: 81 [2022-01-11 00:10:54,905 INFO L226 Difference]: Without dead ends: 55 [2022-01-11 00:10:54,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-11 00:10:54,907 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:54,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:10:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-11 00:10:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-11 00:10:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (43), 15 states have call predecessors, (43), 7 states have call successors, (43) [2022-01-11 00:10:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 82 transitions. [2022-01-11 00:10:54,917 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 82 transitions. Word has length 61 [2022-01-11 00:10:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:54,917 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 82 transitions. [2022-01-11 00:10:54,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:10:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 82 transitions. [2022-01-11 00:10:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-11 00:10:54,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:54,919 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:54,945 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 00:10:55,120 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 00:10:55,120 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash 311221116, now seen corresponding path program 2 times [2022-01-11 00:10:55,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:55,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190116840] [2022-01-11 00:10:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:55,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:10:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:10:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:10:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:10:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:10:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:10:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:10:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 49 proven. 106 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-11 00:10:55,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:55,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190116840] [2022-01-11 00:10:55,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190116840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:10:55,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697941704] [2022-01-11 00:10:55,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:10:55,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:10:55,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:10:55,594 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 00:10:55,595 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 00:10:55,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:10:55,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:10:55,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-11 00:10:55,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:10:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 152 proven. 45 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-01-11 00:10:56,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:10:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 154 proven. 23 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-01-11 00:10:57,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697941704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:10:57,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:10:57,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-01-11 00:10:57,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107952643] [2022-01-11 00:10:57,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:10:57,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-11 00:10:57,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:57,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-11 00:10:57,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-11 00:10:57,213 INFO L87 Difference]: Start difference. First operand 49 states and 82 transitions. Second operand has 26 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (24), 12 states have call predecessors, (24), 15 states have call successors, (24) [2022-01-11 00:10:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:57,583 INFO L93 Difference]: Finished difference Result 84 states and 154 transitions. [2022-01-11 00:10:57,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 00:10:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (24), 12 states have call predecessors, (24), 15 states have call successors, (24) Word has length 82 [2022-01-11 00:10:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:57,586 INFO L225 Difference]: With dead ends: 84 [2022-01-11 00:10:57,586 INFO L226 Difference]: Without dead ends: 38 [2022-01-11 00:10:57,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2022-01-11 00:10:57,588 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:57,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 102 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:10:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-11 00:10:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-11 00:10:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 7 states have return successors, (18), 9 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-11 00:10:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-01-11 00:10:57,594 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 82 [2022-01-11 00:10:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:57,594 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-01-11 00:10:57,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (24), 12 states have call predecessors, (24), 15 states have call successors, (24) [2022-01-11 00:10:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-01-11 00:10:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 00:10:57,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:57,602 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:57,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-11 00:10:57,806 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 00:10:57,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:57,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:57,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1832080039, now seen corresponding path program 3 times [2022-01-11 00:10:57,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:57,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272549943] [2022-01-11 00:10:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:57,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:57,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:10:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:57,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:57,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:57,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:57,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:10:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:57,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:10:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:57,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:10:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:58,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:58,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:10:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 34 proven. 59 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:10:58,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:10:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272549943] [2022-01-11 00:10:58,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272549943] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:10:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524847152] [2022-01-11 00:10:58,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 00:10:58,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:10:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:10:58,015 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 00:10:58,016 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 00:10:58,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-11 00:10:58,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:10:58,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:10:58,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:10:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 62 proven. 24 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-01-11 00:10:58,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:10:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 62 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:10:58,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524847152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:10:58,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:10:58,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 9] total 20 [2022-01-11 00:10:58,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788566062] [2022-01-11 00:10:58,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:10:58,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 00:10:58,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:10:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 00:10:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-11 00:10:58,747 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-11 00:10:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:10:59,172 INFO L93 Difference]: Finished difference Result 80 states and 132 transitions. [2022-01-11 00:10:59,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 00:10:59,173 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 61 [2022-01-11 00:10:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:10:59,174 INFO L225 Difference]: With dead ends: 80 [2022-01-11 00:10:59,174 INFO L226 Difference]: Without dead ends: 48 [2022-01-11 00:10:59,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-01-11 00:10:59,176 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:10:59,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 99 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:10:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-11 00:10:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-01-11 00:10:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (29), 12 states have call predecessors, (29), 6 states have call successors, (29) [2022-01-11 00:10:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2022-01-11 00:10:59,194 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 61 [2022-01-11 00:10:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:10:59,194 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2022-01-11 00:10:59,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-11 00:10:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2022-01-11 00:10:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-11 00:10:59,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:10:59,196 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 31, 18, 18, 18, 18, 18, 18, 13, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:10:59,229 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 00:10:59,407 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 00:10:59,408 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:10:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:10:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1099935067, now seen corresponding path program 4 times [2022-01-11 00:10:59,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:10:59,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411513421] [2022-01-11 00:10:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:10:59,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:10:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:10:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:10:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:10:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:10:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:10:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:10:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:10:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:10:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:10:59,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-11 00:10:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3588 backedges. 130 proven. 542 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2022-01-11 00:11:00,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411513421] [2022-01-11 00:11:00,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411513421] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:00,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078907971] [2022-01-11 00:11:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 00:11:00,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:00,154 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 00:11:00,175 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 00:11:00,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 00:11:00,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:11:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 00:11:00,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3588 backedges. 324 proven. 333 refuted. 0 times theorem prover too weak. 2931 trivial. 0 not checked. [2022-01-11 00:11:06,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3588 backedges. 324 proven. 348 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2022-01-11 00:11:07,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078907971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:07,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:07,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 11] total 25 [2022-01-11 00:11:07,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582931410] [2022-01-11 00:11:07,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:07,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-11 00:11:07,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-11 00:11:07,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-11 00:11:07,414 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand has 25 states, 22 states have (on average 2.590909090909091) internal successors, (57), 24 states have internal predecessors, (57), 15 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2022-01-11 00:11:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:08,419 INFO L93 Difference]: Finished difference Result 88 states and 161 transitions. [2022-01-11 00:11:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-11 00:11:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.590909090909091) internal successors, (57), 24 states have internal predecessors, (57), 15 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) Word has length 239 [2022-01-11 00:11:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:08,422 INFO L225 Difference]: With dead ends: 88 [2022-01-11 00:11:08,422 INFO L226 Difference]: Without dead ends: 49 [2022-01-11 00:11:08,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 530 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 00:11:08,424 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:08,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 157 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-11 00:11:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-11 00:11:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-11 00:11:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (31), 13 states have call predecessors, (31), 7 states have call successors, (31) [2022-01-11 00:11:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2022-01-11 00:11:08,433 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 239 [2022-01-11 00:11:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:08,434 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2022-01-11 00:11:08,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.590909090909091) internal successors, (57), 24 states have internal predecessors, (57), 15 states have call successors, (19), 1 states have call predecessors, (19), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2022-01-11 00:11:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2022-01-11 00:11:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-11 00:11:08,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:08,438 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:08,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 00:11:08,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:08,644 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:08,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1283440255, now seen corresponding path program 5 times [2022-01-11 00:11:08,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:08,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992811520] [2022-01-11 00:11:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:08,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:08,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:11:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:11:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-11 00:11:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:11:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-11 00:11:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 202 proven. 971 refuted. 0 times theorem prover too weak. 5647 trivial. 0 not checked. [2022-01-11 00:11:09,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992811520] [2022-01-11 00:11:09,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992811520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308647416] [2022-01-11 00:11:09,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 00:11:09,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:09,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:09,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:09,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 00:11:10,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-11 00:11:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:11:10,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 00:11:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 3629 proven. 30 refuted. 0 times theorem prover too weak. 3161 trivial. 0 not checked. [2022-01-11 00:11:15,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 505 proven. 735 refuted. 0 times theorem prover too weak. 5580 trivial. 0 not checked. [2022-01-11 00:11:16,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308647416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:16,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:16,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 9] total 24 [2022-01-11 00:11:16,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784914229] [2022-01-11 00:11:16,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:16,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 00:11:16,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 00:11:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-11 00:11:16,511 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand has 24 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (22), 2 states have call predecessors, (22), 12 states have return successors, (29), 16 states have call predecessors, (29), 15 states have call successors, (29) [2022-01-11 00:11:19,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:19,377 INFO L93 Difference]: Finished difference Result 103 states and 218 transitions. [2022-01-11 00:11:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-11 00:11:19,378 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (22), 2 states have call predecessors, (22), 12 states have return successors, (29), 16 states have call predecessors, (29), 15 states have call successors, (29) Word has length 326 [2022-01-11 00:11:19,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:19,379 INFO L225 Difference]: With dead ends: 103 [2022-01-11 00:11:19,379 INFO L226 Difference]: Without dead ends: 60 [2022-01-11 00:11:19,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 736 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=341, Invalid=1219, Unknown=0, NotChecked=0, Total=1560 [2022-01-11 00:11:19,380 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 115 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:19,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 150 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-11 00:11:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-11 00:11:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-01-11 00:11:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (30), 14 states have call predecessors, (30), 12 states have call successors, (30) [2022-01-11 00:11:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-01-11 00:11:19,389 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 326 [2022-01-11 00:11:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:19,389 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-01-11 00:11:19,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.85) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (22), 2 states have call predecessors, (22), 12 states have return successors, (29), 16 states have call predecessors, (29), 15 states have call successors, (29) [2022-01-11 00:11:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-01-11 00:11:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-11 00:11:19,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:19,397 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:19,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-11 00:11:19,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:19,603 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash -781103911, now seen corresponding path program 6 times [2022-01-11 00:11:19,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120422250] [2022-01-11 00:11:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:19,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:11:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-11 00:11:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-11 00:11:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:11:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-11 00:11:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:20,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:21,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:21,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:21,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:11:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:21,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:21,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 210 proven. 1414 refuted. 0 times theorem prover too weak. 5196 trivial. 0 not checked. [2022-01-11 00:11:21,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:21,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120422250] [2022-01-11 00:11:21,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120422250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:21,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604743325] [2022-01-11 00:11:21,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-11 00:11:21,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:21,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:21,017 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:21,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-11 00:11:21,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-01-11 00:11:21,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:11:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-11 00:11:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates...