/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:53:40,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:53:40,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:53:40,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 02:53:40,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:53:40,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:53:40,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:53:40,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:53:40,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:53:40,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:53:40,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:53:40,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:53:40,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:53:40,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:53:40,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:53:40,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:53:40,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 02:53:40,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 02:53:40,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 02:53:40,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 02:53:40,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 02:53:40,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 02:53:40,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 02:53:40,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 02:53:40,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 02:53:40,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 02:53:40,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 02:53:40,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 02:53:40,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 02:53:40,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 02:53:40,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:53:40,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:53:40,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:53:40,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 02:53:40,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:53:40,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:53:40,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:53:40,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:53:40,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:53:40,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:53:40,421 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:53:40,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:53:40,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:53:40,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:53:40,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:53:40,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:53:40,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:53:40,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:53:40,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:53:40,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:53:40,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:53:40,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:53:40,423 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:53:40,423 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:53:40,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:53:40,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:53:40,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:53:40,424 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:53:40,424 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:53:40,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:53:40,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:53:40,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:53:40,647 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:53:40,648 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:53:40,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2022-01-11 02:53:40,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4e13a2a/0d88f164f0314d009437d70b00b50cbd/FLAG3517a7215 [2022-01-11 02:53:41,101 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:53:41,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2022-01-11 02:53:41,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4e13a2a/0d88f164f0314d009437d70b00b50cbd/FLAG3517a7215 [2022-01-11 02:53:41,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4e13a2a/0d88f164f0314d009437d70b00b50cbd [2022-01-11 02:53:41,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:53:41,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:53:41,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:53:41,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:53:41,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:53:41,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c532466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41, skipping insertion in model container [2022-01-11 02:53:41,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:53:41,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:53:41,298 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-examples/standard_copy4_ground-2.i[816,829] [2022-01-11 02:53:41,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:53:41,328 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:53:41,338 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-examples/standard_copy4_ground-2.i[816,829] [2022-01-11 02:53:41,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:53:41,376 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:53:41,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41 WrapperNode [2022-01-11 02:53:41,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:53:41,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:53:41,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:53:41,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:53:41,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,421 INFO L137 Inliner]: procedures = 18, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 113 [2022-01-11 02:53:41,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:53:41,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:53:41,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:53:41,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:53:41,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:53:41,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:53:41,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:53:41,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:53:41,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:53:41,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:53:41,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 02:53:41,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 02:53:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:53:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:53:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 02:53:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 02:53:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:53:41,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:53:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 02:53:41,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 02:53:41,597 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:53:41,598 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:53:41,821 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:53:41,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:53:41,825 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-11 02:53:41,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:53:41 BoogieIcfgContainer [2022-01-11 02:53:41,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:53:41,827 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:53:41,827 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:53:41,828 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:53:41,830 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:53:41" (1/1) ... [2022-01-11 02:53:41,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:53:41 BasicIcfg [2022-01-11 02:53:41,924 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:53:41,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:53:41,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:53:41,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:53:41,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:53:41" (1/4) ... [2022-01-11 02:53:41,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cdb015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:53:41, skipping insertion in model container [2022-01-11 02:53:41,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:53:41" (2/4) ... [2022-01-11 02:53:41,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cdb015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:53:41, skipping insertion in model container [2022-01-11 02:53:41,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:53:41" (3/4) ... [2022-01-11 02:53:41,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cdb015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:53:41, skipping insertion in model container [2022-01-11 02:53:41,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:53:41" (4/4) ... [2022-01-11 02:53:41,929 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.iTransformedIcfg [2022-01-11 02:53:41,941 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:53:41,942 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 02:53:41,981 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:53:41,987 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 02:53:41,988 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 02:53:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-11 02:53:42,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:53:42,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:53:42,001 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:53:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:53:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash 67566259, now seen corresponding path program 1 times [2022-01-11 02:53:42,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:53:42,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344506843] [2022-01-11 02:53:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:53:42,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:53:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:53:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:53:42,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:53:42,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344506843] [2022-01-11 02:53:42,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344506843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:53:42,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:53:42,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:53:42,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000007839] [2022-01-11 02:53:42,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:53:42,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:53:42,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:53:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:53:42,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:53:42,253 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:53:42,263 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2022-01-11 02:53:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:53:42,265 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-11 02:53:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:53:42,269 INFO L225 Difference]: With dead ends: 50 [2022-01-11 02:53:42,269 INFO L226 Difference]: Without dead ends: 23 [2022-01-11 02:53:42,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:53:42,273 INFO L933 BasicCegarLoop]: 32 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, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:53:42,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:53:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-11 02:53:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-11 02:53:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-01-11 02:53:42,297 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2022-01-11 02:53:42,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:53:42,298 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-01-11 02:53:42,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-01-11 02:53:42,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-11 02:53:42,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:53:42,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:53:42,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:53:42,301 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:53:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:53:42,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1353151928, now seen corresponding path program 1 times [2022-01-11 02:53:42,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:53:42,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301586680] [2022-01-11 02:53:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:53:42,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:53:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:53:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:53:42,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:53:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301586680] [2022-01-11 02:53:42,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301586680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:53:42,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:53:42,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:53:42,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057279167] [2022-01-11 02:53:42,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:53:42,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:53:42,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:53:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:53:42,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:53:42,439 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:53:42,466 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-01-11 02:53:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:53:42,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-11 02:53:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:53:42,468 INFO L225 Difference]: With dead ends: 44 [2022-01-11 02:53:42,468 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 02:53:42,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:53:42,469 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:53:42,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:53:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 02:53:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-11 02:53:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-11 02:53:42,473 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2022-01-11 02:53:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:53:42,474 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-11 02:53:42,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:42,474 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-11 02:53:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-11 02:53:42,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:53:42,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:53:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:53:42,475 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:53:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:53:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2058267530, now seen corresponding path program 1 times [2022-01-11 02:53:42,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:53:42,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155285225] [2022-01-11 02:53:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:53:42,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:53:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:53:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 02:53:42,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:53:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155285225] [2022-01-11 02:53:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155285225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:53:42,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:53:42,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:53:42,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074378686] [2022-01-11 02:53:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:53:42,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:53:42,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:53:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:53:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:53:42,567 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:53:42,629 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-01-11 02:53:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:53:42,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-11 02:53:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:53:42,632 INFO L225 Difference]: With dead ends: 48 [2022-01-11 02:53:42,632 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 02:53:42,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:53:42,639 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:53:42,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:53:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 02:53:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-01-11 02:53:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2022-01-11 02:53:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-11 02:53:42,655 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2022-01-11 02:53:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:53:42,655 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-11 02:53:42,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-11 02:53:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-11 02:53:42,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:53:42,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:53:42,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 02:53:42,656 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:53:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:53:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash 157722158, now seen corresponding path program 1 times [2022-01-11 02:53:42,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:53:42,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924439022] [2022-01-11 02:53:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:53:42,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:53:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:53:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 02:53:42,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:53:42,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924439022] [2022-01-11 02:53:42,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924439022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:53:42,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528326619] [2022-01-11 02:53:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:53:42,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:53:42,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:53:42,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:53:42,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 02:53:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:53:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-11 02:53:43,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:53:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 02:53:43,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:53:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 02:53:43,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528326619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:53:43,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:53:43,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-11 02:53:43,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430381360] [2022-01-11 02:53:43,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:53:43,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 02:53:43,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:53:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 02:53:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-11 02:53:43,302 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:53:43,366 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-01-11 02:53:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 02:53:43,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 25 [2022-01-11 02:53:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:53:43,368 INFO L225 Difference]: With dead ends: 57 [2022-01-11 02:53:43,368 INFO L226 Difference]: Without dead ends: 34 [2022-01-11 02:53:43,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-11 02:53:43,369 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:53:43,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 98 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:53:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-11 02:53:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-11 02:53:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-01-11 02:53:43,374 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 25 [2022-01-11 02:53:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:53:43,374 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-01-11 02:53:43,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-01-11 02:53:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-11 02:53:43,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:53:43,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:53:43,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 02:53:43,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:53:43,580 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:53:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:53:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2021549208, now seen corresponding path program 2 times [2022-01-11 02:53:43,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:53:43,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990722282] [2022-01-11 02:53:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:53:43,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:53:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:53:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-11 02:53:43,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:53:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990722282] [2022-01-11 02:53:43,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990722282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:53:43,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710428279] [2022-01-11 02:53:43,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:53:43,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:53:43,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:53:43,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:53:43,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 02:53:43,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:53:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:53:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-11 02:53:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:53:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 02:53:44,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:53:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-11 02:53:44,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710428279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:53:44,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:53:44,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-01-11 02:53:44,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663416461] [2022-01-11 02:53:44,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:53:44,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-11 02:53:44,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:53:44,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-11 02:53:44,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-11 02:53:44,141 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:53:44,440 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2022-01-11 02:53:44,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 02:53:44,441 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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 31 [2022-01-11 02:53:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:53:44,442 INFO L225 Difference]: With dead ends: 77 [2022-01-11 02:53:44,442 INFO L226 Difference]: Without dead ends: 58 [2022-01-11 02:53:44,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-11 02:53:44,442 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 02:53:44,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 68 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 02:53:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-11 02:53:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-11 02:53:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2022-01-11 02:53:44,449 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 31 [2022-01-11 02:53:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:53:44,449 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2022-01-11 02:53:44,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:53:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2022-01-11 02:53:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-11 02:53:44,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:53:44,450 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:53:44,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 02:53:44,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:53:44,656 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:53:44,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:53:44,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1525853552, now seen corresponding path program 3 times [2022-01-11 02:53:44,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:53:44,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935336187] [2022-01-11 02:53:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:53:44,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:53:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:53:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-11 02:53:44,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:53:44,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935336187] [2022-01-11 02:53:44,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935336187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:53:44,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445680125] [2022-01-11 02:53:44,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 02:53:44,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:53:44,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:53:44,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:53:44,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 02:53:50,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-11 02:53:50,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:53:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-11 02:53:50,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:53:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-11 02:53:55,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:53:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-11 02:53:56,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445680125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:53:56,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:53:56,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 19 [2022-01-11 02:53:56,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800907611] [2022-01-11 02:53:56,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:53:56,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 02:53:56,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:53:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 02:53:56,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=275, Unknown=2, NotChecked=0, Total=342 [2022-01-11 02:53:56,070 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:54:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:54:05,724 INFO L93 Difference]: Finished difference Result 156 states and 190 transitions. [2022-01-11 02:54:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-11 02:54:05,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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 55 [2022-01-11 02:54:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:54:05,726 INFO L225 Difference]: With dead ends: 156 [2022-01-11 02:54:05,726 INFO L226 Difference]: Without dead ends: 109 [2022-01-11 02:54:05,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=116, Invalid=433, Unknown=3, NotChecked=0, Total=552 [2022-01-11 02:54:05,728 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 134 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-11 02:54:05,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 143 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 550 Invalid, 0 Unknown, 2 Unchecked, 2.6s Time] [2022-01-11 02:54:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-11 02:54:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-01-11 02:54:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0560747663551402) internal successors, (113), 107 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:54:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2022-01-11 02:54:05,739 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 55 [2022-01-11 02:54:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:54:05,739 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2022-01-11 02:54:05,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:54:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2022-01-11 02:54:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-11 02:54:05,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:54:05,740 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:54:05,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 02:54:05,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:54:05,949 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:54:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:54:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1402946146, now seen corresponding path program 4 times [2022-01-11 02:54:05,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:54:05,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554878318] [2022-01-11 02:54:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:54:05,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:54:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:54:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-01-11 02:54:06,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:54:06,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554878318] [2022-01-11 02:54:06,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554878318] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:54:06,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700597845] [2022-01-11 02:54:06,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 02:54:06,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:54:06,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:54:06,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:54:06,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 02:54:06,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 02:54:06,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:54:06,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-11 02:54:06,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:54:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-01-11 02:54:15,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:54:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 55 proven. 50 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-01-11 02:54:22,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700597845] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:54:22,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:54:22,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 14] total 25 [2022-01-11 02:54:22,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820289654] [2022-01-11 02:54:22,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:54:22,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-11 02:54:22,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:54:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-11 02:54:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=482, Unknown=5, NotChecked=0, Total=600 [2022-01-11 02:54:22,642 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:54:36,718 WARN L228 SmtUtils]: Spent 8.89s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-11 02:54:46,119 WARN L228 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 42 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)