/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/array-multidimensional/rev-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:26:30,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:26:30,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:26:30,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 21:26:30,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 21:26:30,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 21:26:30,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 21:26:30,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 21:26:30,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 21:26:30,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 21:26:30,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 21:26:30,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 21:26:30,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:26:30,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:26:30,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:26:30,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:26:30,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:26:30,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:26:30,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:26:30,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:26:30,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:26:30,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:26:30,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:26:30,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:26:30,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:26:30,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 21:26:30,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 21:26:30,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 21:26:30,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 21:26:30,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 21:26:30,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 21:26:30,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 21:26:30,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 21:26:30,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:26:30,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:26:30,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:26:30,345 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 [2022-01-10 21:26:30,371 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:26:30,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:26:30,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:26:30,372 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:26:30,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:26:30,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:26:30,373 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:26:30,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:26:30,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:26:30,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:26:30,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:26:30,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:26:30,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:26:30,374 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:26:30,374 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:26:30,374 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:26:30,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:26:30,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:26:30,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:26:30,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:26:30,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:26:30,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:26:30,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:26:30,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:26:30,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:26:30,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:26:30,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:26:30,377 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:26:30,377 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:26:30,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:26:30,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:26:30,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:26:30,377 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:26:30,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:26:30,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:26:30,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:26:30,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:26:30,567 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:26:30,568 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:26:30,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c [2022-01-10 21:26:30,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ad719f8/c8abb4fd7165449a81e527243ab8e162/FLAG4d7622361 [2022-01-10 21:26:30,939 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:26:30,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c [2022-01-10 21:26:30,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ad719f8/c8abb4fd7165449a81e527243ab8e162/FLAG4d7622361 [2022-01-10 21:26:31,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ad719f8/c8abb4fd7165449a81e527243ab8e162 [2022-01-10 21:26:31,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:26:31,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:26:31,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:26:31,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:26:31,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:26:31,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4313210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31, skipping insertion in model container [2022-01-10 21:26:31,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:26:31,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:26:31,521 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c[321,334] [2022-01-10 21:26:31,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:26:31,546 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:26:31,557 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c[321,334] [2022-01-10 21:26:31,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:26:31,573 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:26:31,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31 WrapperNode [2022-01-10 21:26:31,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:26:31,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:26:31,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:26:31,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:26:31,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,606 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-01-10 21:26:31,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:26:31,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:26:31,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:26:31,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:26:31,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:26:31,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:26:31,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:26:31,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:26:31,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (1/1) ... [2022-01-10 21:26:31,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:26:31,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:31,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 21:26:31,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 21:26:31,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:26:31,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:26:31,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 21:26:31,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 21:26:31,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:26:31,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:26:31,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 21:26:31,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 21:26:31,726 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:26:31,727 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:26:32,089 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:26:32,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:26:32,093 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-10 21:26:32,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:26:32 BoogieIcfgContainer [2022-01-10 21:26:32,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:26:32,095 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:26:32,095 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:26:32,096 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:26:32,098 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:26:32" (1/1) ... [2022-01-10 21:26:32,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:26:32 BasicIcfg [2022-01-10 21:26:32,198 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:26:32,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:26:32,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:26:32,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:26:32,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:26:31" (1/4) ... [2022-01-10 21:26:32,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec986d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:26:32, skipping insertion in model container [2022-01-10 21:26:32,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:26:31" (2/4) ... [2022-01-10 21:26:32,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec986d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:26:32, skipping insertion in model container [2022-01-10 21:26:32,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:26:32" (3/4) ... [2022-01-10 21:26:32,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec986d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:26:32, skipping insertion in model container [2022-01-10 21:26:32,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:26:32" (4/4) ... [2022-01-10 21:26:32,205 INFO L111 eAbstractionObserver]: Analyzing ICFG rev-2-n-u.cTransformedIcfg [2022-01-10 21:26:32,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:26:32,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:26:32,240 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:26:32,244 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 21:26:32,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:26:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 21:26:32,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:32,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:26:32,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1817182511, now seen corresponding path program 1 times [2022-01-10 21:26:32,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:32,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543431518] [2022-01-10 21:26:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:32,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:32,336 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:32,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110511935] [2022-01-10 21:26:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:32,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:32,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:32,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:26:32,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 21:26:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:26:32,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 21:26:32,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:26:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:26:32,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:26:32,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:26:32,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543431518] [2022-01-10 21:26:32,524 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:26:32,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110511935] [2022-01-10 21:26:32,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110511935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:26:32,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:26:32,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:26:32,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275956793] [2022-01-10 21:26:32,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:26:32,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 21:26:32,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:26:32,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 21:26:32,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:26:32,555 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:26:32,570 INFO L93 Difference]: Finished difference Result 40 states and 64 transitions. [2022-01-10 21:26:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 21:26:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 21:26:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:26:32,577 INFO L225 Difference]: With dead ends: 40 [2022-01-10 21:26:32,577 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 21:26:32,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:26:32,584 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:26:32,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:26:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 21:26:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 21:26:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-01-10 21:26:32,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2022-01-10 21:26:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:26:32,620 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-01-10 21:26:32,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-01-10 21:26:32,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 21:26:32,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:32,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:26:32,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 21:26:32,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-10 21:26:32,836 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:32,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:32,836 INFO L85 PathProgramCache]: Analyzing trace with hash -45743025, now seen corresponding path program 1 times [2022-01-10 21:26:32,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:32,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288354641] [2022-01-10 21:26:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:32,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:32,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:32,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407488474] [2022-01-10 21:26:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:32,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:32,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:32,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:26:32,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 21:26:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:26:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:26:32,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:26:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:26:33,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:26:33,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:26:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288354641] [2022-01-10 21:26:33,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:26:33,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407488474] [2022-01-10 21:26:33,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407488474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:26:33,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:26:33,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 21:26:33,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212102332] [2022-01-10 21:26:33,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:26:33,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:26:33,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:26:33,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:26:33,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:26:33,125 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:26:33,504 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2022-01-10 21:26:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:26:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 21:26:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:26:33,506 INFO L225 Difference]: With dead ends: 45 [2022-01-10 21:26:33,506 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 21:26:33,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:26:33,507 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:26:33,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 21:26:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 21:26:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2022-01-10 21:26:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-01-10 21:26:33,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-01-10 21:26:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:26:33,511 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-01-10 21:26:33,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-01-10 21:26:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 21:26:33,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:33,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:26:33,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 21:26:33,723 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,SelfDestructingSolverStorable1 [2022-01-10 21:26:33,723 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1080138002, now seen corresponding path program 1 times [2022-01-10 21:26:33,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19701813] [2022-01-10 21:26:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:33,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:33,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:33,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602284488] [2022-01-10 21:26:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:33,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:33,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:33,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:26:33,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 21:26:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:26:33,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 21:26:33,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:26:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:26:34,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:26:34,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:26:34,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19701813] [2022-01-10 21:26:34,019 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:26:34,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602284488] [2022-01-10 21:26:34,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602284488] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:26:34,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:26:34,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 21:26:34,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975891282] [2022-01-10 21:26:34,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:26:34,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:26:34,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:26:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:26:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:26:34,022 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:26:34,162 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-01-10 21:26:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:26:34,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 21:26:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:26:34,163 INFO L225 Difference]: With dead ends: 55 [2022-01-10 21:26:34,163 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 21:26:34,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:26:34,164 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:26:34,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 21:26:34,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 21:26:34,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-10 21:26:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-01-10 21:26:34,167 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-01-10 21:26:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:26:34,167 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-01-10 21:26:34,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-01-10 21:26:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 21:26:34,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:34,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:26:34,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 21:26:34,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:34,375 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1136555454, now seen corresponding path program 1 times [2022-01-10 21:26:34,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:34,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388433943] [2022-01-10 21:26:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:34,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:34,410 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:34,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853001019] [2022-01-10 21:26:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:34,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:34,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:26:34,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 21:26:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:26:34,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 21:26:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:26:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 21:26:34,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:26:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:26:35,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:26:35,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388433943] [2022-01-10 21:26:35,008 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:26:35,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853001019] [2022-01-10 21:26:35,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853001019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:26:35,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:26:35,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2022-01-10 21:26:35,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41310231] [2022-01-10 21:26:35,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:26:35,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 21:26:35,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:26:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 21:26:35,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-10 21:26:35,009 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:26:36,664 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2022-01-10 21:26:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 21:26:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 21:26:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:26:36,665 INFO L225 Difference]: With dead ends: 67 [2022-01-10 21:26:36,665 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 21:26:36,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-01-10 21:26:36,666 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:26:36,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 51 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 21:26:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 21:26:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-01-10 21:26:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-01-10 21:26:36,673 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-01-10 21:26:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:26:36,673 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-01-10 21:26:36,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-01-10 21:26:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 21:26:36,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:36,673 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:26:36,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 21:26:36,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:36,881 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash 259056946, now seen corresponding path program 2 times [2022-01-10 21:26:36,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:36,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105825893] [2022-01-10 21:26:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:36,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:36,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:36,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799090974] [2022-01-10 21:26:36,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:26:36,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:36,919 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:26:36,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 21:26:37,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:26:37,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:26:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 21:26:37,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:26:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:26:38,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:26:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:26:40,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:26:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105825893] [2022-01-10 21:26:40,326 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:26:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799090974] [2022-01-10 21:26:40,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799090974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:26:40,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:26:40,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-01-10 21:26:40,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660551657] [2022-01-10 21:26:40,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:26:40,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 21:26:40,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:26:40,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 21:26:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-10 21:26:40,328 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:54,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:26:54,731 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2022-01-10 21:26:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 21:26:54,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-10 21:26:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:26:54,732 INFO L225 Difference]: With dead ends: 124 [2022-01-10 21:26:54,732 INFO L226 Difference]: Without dead ends: 100 [2022-01-10 21:26:54,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 21:26:54,733 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 142 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:26:54,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 190 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 281 Invalid, 0 Unknown, 11 Unchecked, 4.2s Time] [2022-01-10 21:26:54,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-10 21:26:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 42. [2022-01-10 21:26:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-01-10 21:26:54,748 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-01-10 21:26:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:26:54,748 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-01-10 21:26:54,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-01-10 21:26:54,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 21:26:54,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:54,749 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:26:54,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-10 21:26:54,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:54,954 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:54,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1997748317, now seen corresponding path program 3 times [2022-01-10 21:26:54,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:54,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300976332] [2022-01-10 21:26:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:54,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:54,981 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:54,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844076526] [2022-01-10 21:26:54,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 21:26:54,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:54,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:54,982 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) [2022-01-10 21:26:54,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 21:26:55,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 21:26:55,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:26:55,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 21:26:55,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:26:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 21:26:55,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:26:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 21:26:55,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:26:55,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300976332] [2022-01-10 21:26:55,393 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:26:55,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844076526] [2022-01-10 21:26:55,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844076526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:26:55,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:26:55,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2022-01-10 21:26:55,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614124899] [2022-01-10 21:26:55,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:26:55,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 21:26:55,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:26:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 21:26:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-10 21:26:55,394 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:26:55,755 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2022-01-10 21:26:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 21:26:55,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-10 21:26:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:26:55,757 INFO L225 Difference]: With dead ends: 92 [2022-01-10 21:26:55,757 INFO L226 Difference]: Without dead ends: 60 [2022-01-10 21:26:55,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 21:26:55,759 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:26:55,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 21:26:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-10 21:26:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-10 21:26:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-01-10 21:26:55,785 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 23 [2022-01-10 21:26:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:26:55,785 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-01-10 21:26:55,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-01-10 21:26:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 21:26:55,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:55,788 INFO L514 BasicCegarLoop]: trace histogram [13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:26:55,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 21:26:55,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:55,992 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1361003656, now seen corresponding path program 4 times [2022-01-10 21:26:55,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:55,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840274664] [2022-01-10 21:26:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:55,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:56,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:56,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094400698] [2022-01-10 21:26:56,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 21:26:56,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:56,048 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) [2022-01-10 21:26:56,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 21:26:56,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 21:26:56,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:26:56,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:26:56,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:26:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-10 21:26:56,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:26:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-10 21:26:56,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:26:56,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840274664] [2022-01-10 21:26:56,515 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 21:26:56,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094400698] [2022-01-10 21:26:56,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094400698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:26:56,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 21:26:56,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-10 21:26:56,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078099298] [2022-01-10 21:26:56,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 21:26:56,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 21:26:56,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:26:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 21:26:56,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 21:26:56,517 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:26:57,597 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2022-01-10 21:26:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 21:26:57,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-10 21:26:57,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:26:57,599 INFO L225 Difference]: With dead ends: 135 [2022-01-10 21:26:57,599 INFO L226 Difference]: Without dead ends: 111 [2022-01-10 21:26:57,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-01-10 21:26:57,600 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:26:57,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 80 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:26:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-10 21:26:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 65. [2022-01-10 21:26:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.234375) internal successors, (79), 64 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-01-10 21:26:57,623 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 41 [2022-01-10 21:26:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:26:57,624 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-01-10 21:26:57,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:26:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-01-10 21:26:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 21:26:57,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:26:57,624 INFO L514 BasicCegarLoop]: trace histogram [13, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:26:57,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 21:26:57,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:57,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:26:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:26:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 65393741, now seen corresponding path program 5 times [2022-01-10 21:26:57,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:26:57,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384040739] [2022-01-10 21:26:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:26:57,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:26:57,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 21:26:57,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581437590] [2022-01-10 21:26:57,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 21:26:57,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:26:57,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:26:57,869 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) [2022-01-10 21:26:57,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process