/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_LAZY.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 17:52:12,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 17:52:12,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 17:52:12,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 17:52:12,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 17:52:12,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 17:52:12,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 17:52:12,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 17:52:12,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 17:52:12,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 17:52:12,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 17:52:12,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 17:52:12,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 17:52:12,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 17:52:12,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 17:52:12,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 17:52:12,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 17:52:12,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 17:52:12,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 17:52:12,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 17:52:12,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 17:52:12,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 17:52:12,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 17:52:12,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 17:52:12,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 17:52:12,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 17:52:12,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 17:52:12,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 17:52:12,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 17:52:12,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 17:52:12,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 17:52:12,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 17:52:12,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 17:52:12,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 17:52:12,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 17:52:12,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 17:52:12,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 17:52:12,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 17:52:12,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 17:52:12,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 17:52:12,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 17:52:12,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 17:52:12,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 17:52:12,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 17:52:12,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 17:52:12,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 17:52:12,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 17:52:12,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 17:52:12,631 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 17:52:12,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 17:52:12,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 17:52:12,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 17:52:12,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 17:52:12,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 17:52:12,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 17:52:12,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 17:52:12,634 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 17:52:12,634 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 17:52:12,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 17:52:12,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 17:52:12,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 17:52:12,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 17:52:12,826 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 17:52:12,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-01-10 17:52:12,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/361d8ae70/a36460410eee4c219908a87d5409cbb2/FLAG9f7944e79 [2022-01-10 17:52:13,299 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 17:52:13,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-01-10 17:52:13,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/361d8ae70/a36460410eee4c219908a87d5409cbb2/FLAG9f7944e79 [2022-01-10 17:52:13,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/361d8ae70/a36460410eee4c219908a87d5409cbb2 [2022-01-10 17:52:13,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 17:52:13,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 17:52:13,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 17:52:13,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 17:52:13,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 17:52:13,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:13,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c8e07a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13, skipping insertion in model container [2022-01-10 17:52:13,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:13,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 17:52:13,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 17:52:13,936 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-01-10 17:52:13,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 17:52:13,947 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 17:52:13,977 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-01-10 17:52:13,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 17:52:13,995 INFO L208 MainTranslator]: Completed translation [2022-01-10 17:52:13,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13 WrapperNode [2022-01-10 17:52:13,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 17:52:13,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 17:52:13,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 17:52:13,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 17:52:14,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,032 INFO L137 Inliner]: procedures = 130, calls = 40, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 238 [2022-01-10 17:52:14,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 17:52:14,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 17:52:14,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 17:52:14,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 17:52:14,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 17:52:14,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 17:52:14,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 17:52:14,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 17:52:14,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (1/1) ... [2022-01-10 17:52:14,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 17:52:14,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:52:14,091 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 17:52:14,092 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 17:52:14,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 17:52:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 17:52:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 17:52:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 17:52:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 17:52:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 17:52:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-01-10 17:52:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 17:52:14,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 17:52:14,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 17:52:14,231 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 17:52:14,233 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 17:52:14,591 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 17:52:14,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 17:52:14,596 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-10 17:52:14,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:52:14 BoogieIcfgContainer [2022-01-10 17:52:14,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 17:52:14,598 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 17:52:14,598 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 17:52:14,599 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 17:52:14,600 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:52:14" (1/1) ... [2022-01-10 17:52:14,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 05:52:14 BasicIcfg [2022-01-10 17:52:14,675 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 17:52:14,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 17:52:14,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 17:52:14,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 17:52:14,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:52:13" (1/4) ... [2022-01-10 17:52:14,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b95b200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:52:14, skipping insertion in model container [2022-01-10 17:52:14,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:52:13" (2/4) ... [2022-01-10 17:52:14,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b95b200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:52:14, skipping insertion in model container [2022-01-10 17:52:14,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:52:14" (3/4) ... [2022-01-10 17:52:14,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b95b200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 05:52:14, skipping insertion in model container [2022-01-10 17:52:14,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 05:52:14" (4/4) ... [2022-01-10 17:52:14,680 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.iTransformedIcfg [2022-01-10 17:52:14,683 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 17:52:14,683 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 17:52:14,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 17:52:14,715 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 17:52:14,715 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 17:52:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 1.6) internal successors, (88), 56 states have internal predecessors, (88), 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 17:52:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 17:52:14,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:14,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:52:14,729 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:14,732 INFO L85 PathProgramCache]: Analyzing trace with hash -37374423, now seen corresponding path program 1 times [2022-01-10 17:52:14,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:14,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853725063] [2022-01-10 17:52:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:14,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:14,893 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 17:52:14,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:14,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853725063] [2022-01-10 17:52:14,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853725063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:52:14,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:52:14,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 17:52:14,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472609132] [2022-01-10 17:52:14,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:52:14,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 17:52:14,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:52:14,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 17:52:14,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 17:52:14,923 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 1.6) internal successors, (88), 56 states have internal predecessors, (88), 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) [2022-01-10 17:52:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:52:14,937 INFO L93 Difference]: Finished difference Result 112 states and 174 transitions. [2022-01-10 17:52:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 17:52:14,939 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 [2022-01-10 17:52:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:52:14,943 INFO L225 Difference]: With dead ends: 112 [2022-01-10 17:52:14,943 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 17:52:14,945 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 [2022-01-10 17:52:14,947 INFO L933 BasicCegarLoop]: 76 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, 76 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 17:52:14,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:52:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 17:52:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-01-10 17:52:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 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 17:52:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2022-01-10 17:52:14,969 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 15 [2022-01-10 17:52:14,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:52:14,969 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2022-01-10 17:52:14,969 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) [2022-01-10 17:52:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2022-01-10 17:52:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 17:52:14,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:14,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:52:14,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 17:52:14,970 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:14,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2138231893, now seen corresponding path program 1 times [2022-01-10 17:52:14,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:14,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538329530] [2022-01-10 17:52:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:14,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:15,153 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 17:52:15,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:15,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538329530] [2022-01-10 17:52:15,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538329530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:52:15,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:52:15,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 17:52:15,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708578152] [2022-01-10 17:52:15,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:52:15,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 17:52:15,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:52:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 17:52:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 17:52:15,158 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-01-10 17:52:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:52:15,252 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2022-01-10 17:52:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 17:52:15,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 [2022-01-10 17:52:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:52:15,254 INFO L225 Difference]: With dead ends: 68 [2022-01-10 17:52:15,254 INFO L226 Difference]: Without dead ends: 48 [2022-01-10 17:52:15,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 17:52:15,259 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 93 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:52:15,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 124 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:52:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-10 17:52:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-01-10 17:52:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 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 17:52:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-01-10 17:52:15,276 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 15 [2022-01-10 17:52:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:52:15,277 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-01-10 17:52:15,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-01-10 17:52:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-01-10 17:52:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 17:52:15,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:15,278 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 17:52:15,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 17:52:15,278 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash -725259815, now seen corresponding path program 1 times [2022-01-10 17:52:15,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:15,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189601181] [2022-01-10 17:52:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:15,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 17:52:15,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:15,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189601181] [2022-01-10 17:52:15,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189601181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:52:15,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:52:15,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 17:52:15,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122903748] [2022-01-10 17:52:15,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:52:15,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 17:52:15,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:52:15,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 17:52:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 17:52:15,451 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 17:52:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:52:15,500 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-01-10 17:52:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 17:52:15,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 17:52:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:52:15,502 INFO L225 Difference]: With dead ends: 90 [2022-01-10 17:52:15,502 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 17:52:15,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 17:52:15,507 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:52:15,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 98 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:52:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 17:52:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2022-01-10 17:52:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 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 17:52:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-01-10 17:52:15,533 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 18 [2022-01-10 17:52:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:52:15,534 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-01-10 17:52:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 17:52:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-01-10 17:52:15,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 17:52:15,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:15,534 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] [2022-01-10 17:52:15,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 17:52:15,535 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1845997607, now seen corresponding path program 1 times [2022-01-10 17:52:15,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:15,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096729375] [2022-01-10 17:52:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:15,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 17:52:15,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:15,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096729375] [2022-01-10 17:52:15,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096729375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:52:15,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453351480] [2022-01-10 17:52:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:15,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:52:15,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:52:15,711 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 17:52:15,712 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 17:52:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:16,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 17:52:16,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:52:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 17:52:16,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:52:16,577 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 17:52:16,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453351480] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 17:52:16,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 17:52:16,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2022-01-10 17:52:16,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679564509] [2022-01-10 17:52:16,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:52:16,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 17:52:16,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:52:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 17:52:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-10 17:52:16,580 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 17:52:16,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:52:16,639 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-01-10 17:52:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 17:52:16,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 21 [2022-01-10 17:52:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:52:16,640 INFO L225 Difference]: With dead ends: 54 [2022-01-10 17:52:16,640 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 17:52:16,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-10 17:52:16,641 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 132 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:52:16,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 63 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:52:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 17:52:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-01-10 17:52:16,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 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 17:52:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-01-10 17:52:16,658 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 21 [2022-01-10 17:52:16,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:52:16,659 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-01-10 17:52:16,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 17:52:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-01-10 17:52:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 17:52:16,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:16,660 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:52:16,680 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 17:52:16,860 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 [2022-01-10 17:52:16,861 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:16,861 INFO L85 PathProgramCache]: Analyzing trace with hash -951795687, now seen corresponding path program 1 times [2022-01-10 17:52:16,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:16,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757644898] [2022-01-10 17:52:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:16,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 17:52:16,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757644898] [2022-01-10 17:52:16,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757644898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:52:16,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:52:16,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 17:52:16,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184497122] [2022-01-10 17:52:16,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:52:16,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 17:52:16,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:52:16,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 17:52:16,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 17:52:16,908 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 17:52:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:52:16,927 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-01-10 17:52:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 17:52:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 [2022-01-10 17:52:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:52:16,928 INFO L225 Difference]: With dead ends: 64 [2022-01-10 17:52:16,928 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 17:52:16,928 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 [2022-01-10 17:52:16,929 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 13 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:52:16,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:52:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 17:52:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-01-10 17:52:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 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) [2022-01-10 17:52:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2022-01-10 17:52:16,937 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 25 [2022-01-10 17:52:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:52:16,938 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2022-01-10 17:52:16,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 17:52:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2022-01-10 17:52:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 17:52:16,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:16,938 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, 1, 1, 1] [2022-01-10 17:52:16,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 17:52:16,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash 445814552, now seen corresponding path program 1 times [2022-01-10 17:52:16,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:16,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745638111] [2022-01-10 17:52:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:16,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 17:52:17,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:17,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745638111] [2022-01-10 17:52:17,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745638111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:52:17,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125209465] [2022-01-10 17:52:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:17,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:52:17,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:52:17,073 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 17:52:17,075 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 17:52:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 17:52:17,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:52:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 17:52:17,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:52:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 17:52:17,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125209465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 17:52:17,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 17:52:17,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 9] total 15 [2022-01-10 17:52:17,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772780741] [2022-01-10 17:52:17,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 17:52:17,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 17:52:17,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:52:17,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 17:52:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-10 17:52:17,743 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 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 17:52:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:52:18,773 INFO L93 Difference]: Finished difference Result 198 states and 250 transitions. [2022-01-10 17:52:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 17:52:18,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 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 28 [2022-01-10 17:52:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:52:18,774 INFO L225 Difference]: With dead ends: 198 [2022-01-10 17:52:18,774 INFO L226 Difference]: Without dead ends: 128 [2022-01-10 17:52:18,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 17:52:18,776 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 454 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 17:52:18,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 519 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 17:52:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-10 17:52:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 91. [2022-01-10 17:52:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 90 states have internal predecessors, (112), 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 17:52:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2022-01-10 17:52:18,796 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 28 [2022-01-10 17:52:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:52:18,796 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2022-01-10 17:52:18,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 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 17:52:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2022-01-10 17:52:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 17:52:18,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:18,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:52:18,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 17:52:19,015 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,SelfDestructingSolverStorable5 [2022-01-10 17:52:19,016 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1166728546, now seen corresponding path program 2 times [2022-01-10 17:52:19,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568332752] [2022-01-10 17:52:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:19,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 17:52:19,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:19,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568332752] [2022-01-10 17:52:19,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568332752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:52:19,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102515210] [2022-01-10 17:52:19,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 17:52:19,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:52:19,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:52:19,130 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 17:52:19,131 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 17:52:19,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 17:52:19,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 17:52:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-10 17:52:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:52:19,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:19,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-01-10 17:52:19,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:19,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-01-10 17:52:20,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 17:52:20,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:20,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-01-10 17:52:20,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-10 17:52:20,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:20,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:20,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:52:20,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 19 [2022-01-10 17:52:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 17:52:20,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 17:52:20,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102515210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:52:20,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 17:52:20,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2022-01-10 17:52:20,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479440750] [2022-01-10 17:52:20,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:52:20,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 17:52:20,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:52:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 17:52:20,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-01-10 17:52:20,357 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2022-01-10 17:52:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:52:20,809 INFO L93 Difference]: Finished difference Result 174 states and 218 transitions. [2022-01-10 17:52:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 17:52:20,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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 37 [2022-01-10 17:52:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:52:20,811 INFO L225 Difference]: With dead ends: 174 [2022-01-10 17:52:20,811 INFO L226 Difference]: Without dead ends: 161 [2022-01-10 17:52:20,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-10 17:52:20,812 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 171 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 17:52:20,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 336 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 214 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-01-10 17:52:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-10 17:52:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 96. [2022-01-10 17:52:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.231578947368421) internal successors, (117), 95 states have internal predecessors, (117), 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 17:52:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2022-01-10 17:52:20,831 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 37 [2022-01-10 17:52:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:52:20,831 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2022-01-10 17:52:20,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2022-01-10 17:52:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2022-01-10 17:52:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 17:52:20,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:20,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:52:20,852 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 17:52:21,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:52:21,048 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:21,049 INFO L85 PathProgramCache]: Analyzing trace with hash -28894517, now seen corresponding path program 1 times [2022-01-10 17:52:21,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:21,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683091247] [2022-01-10 17:52:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:21,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 17:52:21,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:21,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683091247] [2022-01-10 17:52:21,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683091247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:52:21,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990847340] [2022-01-10 17:52:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:21,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:52:21,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:52:21,187 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 17:52:21,189 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 17:52:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:22,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 17:52:22,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:52:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 17:52:22,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:52:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 17:52:23,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990847340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 17:52:23,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 17:52:23,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2022-01-10 17:52:23,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257391099] [2022-01-10 17:52:23,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 17:52:23,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 17:52:23,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:52:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 17:52:23,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-10 17:52:23,766 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 17:52:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:52:24,082 INFO L93 Difference]: Finished difference Result 226 states and 278 transitions. [2022-01-10 17:52:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 17:52:24,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 38 [2022-01-10 17:52:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:52:24,083 INFO L225 Difference]: With dead ends: 226 [2022-01-10 17:52:24,084 INFO L226 Difference]: Without dead ends: 198 [2022-01-10 17:52:24,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-01-10 17:52:24,084 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 198 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 17:52:24,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 443 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 57 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-01-10 17:52:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-10 17:52:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 142. [2022-01-10 17:52:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.2340425531914894) internal successors, (174), 141 states have internal predecessors, (174), 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 17:52:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 174 transitions. [2022-01-10 17:52:24,110 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 174 transitions. Word has length 38 [2022-01-10 17:52:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:52:24,110 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 174 transitions. [2022-01-10 17:52:24,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 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 17:52:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 174 transitions. [2022-01-10 17:52:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 17:52:24,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:24,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:52:24,117 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 17:52:24,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:52:24,317 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1831885099, now seen corresponding path program 2 times [2022-01-10 17:52:24,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:24,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606011766] [2022-01-10 17:52:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:24,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 17:52:25,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606011766] [2022-01-10 17:52:25,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606011766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:52:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354695456] [2022-01-10 17:52:25,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 17:52:25,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:52:25,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:52:25,149 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 17:52:25,151 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 17:52:25,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 17:52:25,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 17:52:25,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 101 conjunts are in the unsatisfiable core [2022-01-10 17:52:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:52:25,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 17:52:25,670 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-10 17:52:25,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-01-10 17:52:25,751 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-10 17:52:25,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-01-10 17:52:25,898 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-01-10 17:52:25,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 20 [2022-01-10 17:52:26,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 17:52:26,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-01-10 17:52:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 42 [2022-01-10 17:52:26,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:26,303 INFO L353 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-01-10 17:52:26,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 48 [2022-01-10 17:52:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 65 [2022-01-10 17:52:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:26,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:26,426 INFO L353 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2022-01-10 17:52:26,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 59 [2022-01-10 17:52:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 78 [2022-01-10 17:52:26,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,795 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 17:52:26,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 255 treesize of output 137 [2022-01-10 17:52:26,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:26,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:26,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:26,947 INFO L353 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-01-10 17:52:26,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 51 [2022-01-10 17:52:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 17:52:26,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:52:27,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:52:27,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 141590 treesize of output 134290 [2022-01-10 17:52:29,073 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2022-01-10 17:52:29,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-10 17:52:29,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-01-10 17:52:29,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157195426] [2022-01-10 17:52:29,073 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-10 17:52:29,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 17:52:29,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:52:29,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 17:52:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 17:52:29,075 INFO L87 Difference]: Start difference. First operand 142 states and 174 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 17:52:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:52:31,167 INFO L93 Difference]: Finished difference Result 324 states and 403 transitions. [2022-01-10 17:52:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 17:52:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 17:52:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:52:31,169 INFO L225 Difference]: With dead ends: 324 [2022-01-10 17:52:31,169 INFO L226 Difference]: Without dead ends: 311 [2022-01-10 17:52:31,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=333, Invalid=2019, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 17:52:31,171 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 494 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 17:52:31,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 666 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 17:52:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-10 17:52:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 154. [2022-01-10 17:52:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.2549019607843137) internal successors, (192), 153 states have internal predecessors, (192), 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 17:52:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 192 transitions. [2022-01-10 17:52:31,216 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 192 transitions. Word has length 41 [2022-01-10 17:52:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:52:31,217 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 192 transitions. [2022-01-10 17:52:31,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 17:52:31,218 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 192 transitions. [2022-01-10 17:52:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 17:52:31,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:52:31,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:52:31,239 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 17:52:31,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:52:31,437 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:52:31,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:52:31,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1503363000, now seen corresponding path program 3 times [2022-01-10 17:52:31,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:52:31,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47951964] [2022-01-10 17:52:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:52:31,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:52:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:52:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 17:52:32,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:52:32,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47951964] [2022-01-10 17:52:32,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47951964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:52:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015374139] [2022-01-10 17:52:32,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 17:52:32,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:52:32,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:52:32,583 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 17:52:32,584 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 17:52:33,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 17:52:33,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 17:52:33,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 119 conjunts are in the unsatisfiable core [2022-01-10 17:52:33,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:52:33,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 17:52:33,714 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-01-10 17:52:33,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 23 [2022-01-10 17:52:33,872 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 17:52:33,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-01-10 17:52:33,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 17:52:34,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 17:52:34,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:34,308 INFO L353 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-01-10 17:52:34,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 31 [2022-01-10 17:52:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:34,589 INFO L353 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2022-01-10 17:52:34,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 65 [2022-01-10 17:52:34,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:34,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:34,605 INFO L353 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2022-01-10 17:52:34,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 56 [2022-01-10 17:52:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:34,799 INFO L353 Elim1Store]: treesize reduction 104, result has 18.1 percent of original size [2022-01-10 17:52:34,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 169 treesize of output 112 [2022-01-10 17:52:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,817 INFO L353 Elim1Store]: treesize reduction 93, result has 13.9 percent of original size [2022-01-10 17:52:34,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 95 [2022-01-10 17:52:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:34,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:34,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:35,003 INFO L353 Elim1Store]: treesize reduction 81, result has 15.6 percent of original size [2022-01-10 17:52:35,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 119 [2022-01-10 17:52:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:35,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:35,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:35,016 INFO L353 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2022-01-10 17:52:35,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 242 treesize of output 130 [2022-01-10 17:52:43,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:43,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:43,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:43,223 INFO L353 Elim1Store]: treesize reduction 190, result has 3.6 percent of original size [2022-01-10 17:52:43,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 364 treesize of output 158 [2022-01-10 17:52:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:46,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:46,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:46,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:46,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:46,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:52:46,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:52:46,420 INFO L353 Elim1Store]: treesize reduction 90, result has 22.4 percent of original size [2022-01-10 17:52:46,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 161 treesize of output 82 [2022-01-10 17:52:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 13 refuted. 1 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 17:52:46,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:52:52,003 INFO L173 IndexEqualityManager]: detected equality via solver