/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:29:42,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:29:42,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:29:42,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:29:42,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:29:42,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:29:42,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:29:42,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:29:42,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:29:42,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:29:42,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:29:42,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:29:42,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:29:42,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:29:42,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:29:42,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:29:42,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:29:42,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:29:42,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:29:42,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:29:42,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:29:42,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:29:42,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:29:42,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:29:42,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:29:42,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:29:42,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:29:42,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:29:42,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:29:42,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:29:42,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:29:42,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:29:42,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:29:42,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:29:42,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:29:42,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:29:42,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:29:42,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:29:42,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:29:42,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:29:42,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:29:42,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:29:42,203 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:29:42,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:29:42,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:29:42,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:29:42,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:29:42,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:29:42,204 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:29:42,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:29:42,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:29:42,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:29:42,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:29:42,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:29:42,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:29:42,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:29:42,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:29:42,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:29:42,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:29:42,206 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:29:42,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:29:42,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:29:42,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:29:42,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:29:42,207 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:29:42,207 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:29:42,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:29:42,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:29:42,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:29:42,408 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:29:42,409 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:29:42,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-1.i [2022-01-11 05:29:42,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9cb407e9/a90c88940d954d4ea096425308836ec2/FLAGb58210f53 [2022-01-11 05:29:42,805 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:29:42,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_of_sll_nondet_append-1.i [2022-01-11 05:29:42,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9cb407e9/a90c88940d954d4ea096425308836ec2/FLAGb58210f53 [2022-01-11 05:29:43,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9cb407e9/a90c88940d954d4ea096425308836ec2 [2022-01-11 05:29:43,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:29:43,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:29:43,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:29:43,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:29:43,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:29:43,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@206ae952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43, skipping insertion in model container [2022-01-11 05:29:43,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:29:43,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:29:43,489 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-1.i[24987,25000] [2022-01-11 05:29:43,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:29:43,500 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:29:43,529 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-1.i[24987,25000] [2022-01-11 05:29:43,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:29:43,559 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:29:43,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43 WrapperNode [2022-01-11 05:29:43,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:29:43,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:29:43,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:29:43,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:29:43,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,609 INFO L137 Inliner]: procedures = 130, calls = 39, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 179 [2022-01-11 05:29:43,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:29:43,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:29:43,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:29:43,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:29:43,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:29:43,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:29:43,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:29:43,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:29:43,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (1/1) ... [2022-01-11 05:29:43,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:29:43,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:29:43,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 05:29:43,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 05:29:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-11 05:29:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:29:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 05:29:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-11 05:29:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-11 05:29:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 05:29:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-01-11 05:29:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:29:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:29:43,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:29:43,779 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:29:43,780 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:29:44,040 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:29:44,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:29:44,044 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-01-11 05:29:44,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:29:44 BoogieIcfgContainer [2022-01-11 05:29:44,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:29:44,046 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:29:44,046 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:29:44,050 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:29:44,052 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:29:44" (1/1) ... [2022-01-11 05:29:44,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:29:44 BasicIcfg [2022-01-11 05:29:44,194 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:29:44,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:29:44,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:29:44,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:29:44,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:29:43" (1/4) ... [2022-01-11 05:29:44,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fc5f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:29:44, skipping insertion in model container [2022-01-11 05:29:44,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:29:43" (2/4) ... [2022-01-11 05:29:44,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fc5f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:29:44, skipping insertion in model container [2022-01-11 05:29:44,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:29:44" (3/4) ... [2022-01-11 05:29:44,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fc5f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:29:44, skipping insertion in model container [2022-01-11 05:29:44,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:29:44" (4/4) ... [2022-01-11 05:29:44,201 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-1.iTransformedIcfg [2022-01-11 05:29:44,204 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:29:44,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:29:44,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:29:44,259 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 05:29:44,260 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:29:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.65) internal successors, (66), 41 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-11 05:29:44,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:29:44,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:29:44,273 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:29:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:29:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1806199711, now seen corresponding path program 1 times [2022-01-11 05:29:44,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:29:44,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853690746] [2022-01-11 05:29:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:29:44,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:29:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:29:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:29:44,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:29:44,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853690746] [2022-01-11 05:29:44,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853690746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:29:44,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:29:44,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 05:29:44,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091428386] [2022-01-11 05:29:44,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:29:44,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 05:29:44,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:29:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 05:29:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 05:29:44,460 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.65) internal successors, (66), 41 states have internal predecessors, (66), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:29:44,481 INFO L93 Difference]: Finished difference Result 82 states and 130 transitions. [2022-01-11 05:29:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 05:29:44,483 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-01-11 05:29:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:29:44,490 INFO L225 Difference]: With dead ends: 82 [2022-01-11 05:29:44,491 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 05:29:44,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 05:29:44,499 INFO L933 BasicCegarLoop]: 56 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, 56 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:29:44,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:29:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 05:29:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-11 05:29:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-01-11 05:29:44,527 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 7 [2022-01-11 05:29:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:29:44,528 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-01-11 05:29:44,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-01-11 05:29:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-11 05:29:44,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:29:44,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:29:44,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:29:44,530 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:29:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:29:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1807123232, now seen corresponding path program 1 times [2022-01-11 05:29:44,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:29:44,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26953758] [2022-01-11 05:29:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:29:44,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:29:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:29:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:29:44,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:29:44,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26953758] [2022-01-11 05:29:44,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26953758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:29:44,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:29:44,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 05:29:44,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405395383] [2022-01-11 05:29:44,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:29:44,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 05:29:44,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:29:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 05:29:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 05:29:44,682 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:29:44,749 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-01-11 05:29:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:29:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-01-11 05:29:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:29:44,751 INFO L225 Difference]: With dead ends: 58 [2022-01-11 05:29:44,751 INFO L226 Difference]: Without dead ends: 42 [2022-01-11 05:29:44,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:29:44,755 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:29:44,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:29:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-11 05:29:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-01-11 05:29:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-01-11 05:29:44,766 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 7 [2022-01-11 05:29:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:29:44,769 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-01-11 05:29:44,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-01-11 05:29:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-11 05:29:44,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:29:44,773 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] [2022-01-11 05:29:44,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:29:44,774 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:29:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:29:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1983525769, now seen corresponding path program 1 times [2022-01-11 05:29:44,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:29:44,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163354126] [2022-01-11 05:29:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:29:44,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:29:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:29:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:29:45,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:29:45,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163354126] [2022-01-11 05:29:45,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163354126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:29:45,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:29:45,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:29:45,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765098020] [2022-01-11 05:29:45,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:29:45,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:29:45,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:29:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:29:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:29:45,020 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:29:45,149 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2022-01-11 05:29:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 05:29:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2022-01-11 05:29:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:29:45,152 INFO L225 Difference]: With dead ends: 103 [2022-01-11 05:29:45,152 INFO L226 Difference]: Without dead ends: 73 [2022-01-11 05:29:45,154 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 [2022-01-11 05:29:45,155 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 63 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:29:45,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 204 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:29:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-11 05:29:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2022-01-11 05:29:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-01-11 05:29:45,160 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 20 [2022-01-11 05:29:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:29:45,161 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-01-11 05:29:45,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-01-11 05:29:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 05:29:45,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:29:45,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:29:45,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 05:29:45,162 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:29:45,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:29:45,162 INFO L85 PathProgramCache]: Analyzing trace with hash 740192992, now seen corresponding path program 2 times [2022-01-11 05:29:45,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:29:45,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076117994] [2022-01-11 05:29:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:29:45,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:29:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:29:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:29:45,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:29:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076117994] [2022-01-11 05:29:45,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076117994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:29:45,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611616980] [2022-01-11 05:29:45,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:29:45,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:29:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:29:45,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:29:45,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:29:45,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-11 05:29:45,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:29:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-11 05:29:45,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:29:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 05:29:45,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 05:29:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611616980] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:29:45,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 05:29:45,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-01-11 05:29:45,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048667673] [2022-01-11 05:29:45,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:29:45,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 05:29:45,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:29:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 05:29:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-11 05:29:45,521 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:29:45,573 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2022-01-11 05:29:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 05:29:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-11 05:29:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:29:45,574 INFO L225 Difference]: With dead ends: 69 [2022-01-11 05:29:45,574 INFO L226 Difference]: Without dead ends: 67 [2022-01-11 05:29:45,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-11 05:29:45,575 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 73 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:29:45,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 67 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:29:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-11 05:29:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2022-01-11 05:29:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-01-11 05:29:45,580 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 23 [2022-01-11 05:29:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:29:45,580 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-01-11 05:29:45,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-01-11 05:29:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-11 05:29:45,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:29:45,581 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2022-01-11 05:29:45,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 05:29:45,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:29:45,785 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:29:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:29:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash 547575255, now seen corresponding path program 1 times [2022-01-11 05:29:45,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:29:45,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886417443] [2022-01-11 05:29:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:29:45,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:29:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:29:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:29:45,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:29:45,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886417443] [2022-01-11 05:29:45,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886417443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:29:45,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341915196] [2022-01-11 05:29:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:29:45,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:29:45,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:29:45,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:29:45,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:29:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:29:46,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-11 05:29:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:29:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:29:46,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:29:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:29:46,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341915196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:29:46,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:29:46,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9] total 17 [2022-01-11 05:29:46,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175709156] [2022-01-11 05:29:46,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:29:46,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-11 05:29:46,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:29:46,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-11 05:29:46,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-01-11 05:29:46,802 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:29:50,581 INFO L93 Difference]: Finished difference Result 272 states and 354 transitions. [2022-01-11 05:29:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-11 05:29:50,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 30 [2022-01-11 05:29:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:29:50,584 INFO L225 Difference]: With dead ends: 272 [2022-01-11 05:29:50,584 INFO L226 Difference]: Without dead ends: 240 [2022-01-11 05:29:50,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=409, Invalid=1151, Unknown=0, NotChecked=0, Total=1560 [2022-01-11 05:29:50,585 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 540 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-11 05:29:50,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 455 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-11 05:29:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-11 05:29:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 153. [2022-01-11 05:29:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2763157894736843) internal successors, (194), 152 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2022-01-11 05:29:50,642 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 30 [2022-01-11 05:29:50,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:29:50,643 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2022-01-11 05:29:50,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2022-01-11 05:29:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 05:29:50,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:29:50,647 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-01-11 05:29:50,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 05:29:50,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:29:50,853 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:29:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:29:50,853 INFO L85 PathProgramCache]: Analyzing trace with hash -43736370, now seen corresponding path program 1 times [2022-01-11 05:29:50,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:29:50,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765494579] [2022-01-11 05:29:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:29:50,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:29:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:29:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:29:51,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:29:51,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765494579] [2022-01-11 05:29:51,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765494579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:29:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399366905] [2022-01-11 05:29:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:29:51,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:29:51,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:29:51,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:29:51,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 05:29:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:29:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-11 05:29:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:29:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:29:52,188 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 [2022-01-11 05:29:52,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:29:52,242 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 [2022-01-11 05:29:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:29:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:29:52,331 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 31 treesize of output 33 [2022-01-11 05:29:52,335 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 [2022-01-11 05:29:52,466 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 57 treesize of output 37 [2022-01-11 05:29:52,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:29:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:29:52,596 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-11 05:29:52,597 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 52 treesize of output 19 [2022-01-11 05:29:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-11 05:29:52,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:29:52,742 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 117 treesize of output 109 [2022-01-11 05:29:53,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:29:53,415 INFO L353 Elim1Store]: treesize reduction 228, result has 55.2 percent of original size [2022-01-11 05:29:53,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 22034 treesize of output 21055 [2022-01-11 05:29:54,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2022-01-11 05:29:54,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-11 05:29:54,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-01-11 05:29:54,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119664858] [2022-01-11 05:29:54,479 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-11 05:29:54,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-11 05:29:54,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:29:54,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-11 05:29:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2022-01-11 05:29:54,480 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:29:54,947 INFO L93 Difference]: Finished difference Result 285 states and 366 transitions. [2022-01-11 05:29:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 05:29:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 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 36 [2022-01-11 05:29:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:29:54,948 INFO L225 Difference]: With dead ends: 285 [2022-01-11 05:29:54,948 INFO L226 Difference]: Without dead ends: 184 [2022-01-11 05:29:54,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-11 05:29:54,949 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 119 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 05:29:54,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 523 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 05:29:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-11 05:29:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2022-01-11 05:29:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2708333333333333) internal successors, (183), 144 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 183 transitions. [2022-01-11 05:29:54,978 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 183 transitions. Word has length 36 [2022-01-11 05:29:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:29:54,978 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 183 transitions. [2022-01-11 05:29:54,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:29:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 183 transitions. [2022-01-11 05:29:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 05:29:54,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:29:54,980 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-01-11 05:29:55,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 05:29:55,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:29:55,202 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:29:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:29:55,203 INFO L85 PathProgramCache]: Analyzing trace with hash -250686400, now seen corresponding path program 2 times [2022-01-11 05:29:55,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:29:55,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127826963] [2022-01-11 05:29:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:29:55,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:29:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:29:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:29:55,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:29:55,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127826963] [2022-01-11 05:29:55,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127826963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:29:55,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852118921] [2022-01-11 05:29:55,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:29:55,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:29:55,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:29:55,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:29:55,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 05:29:57,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:29:57,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:29:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-11 05:29:57,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:29:57,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:29:57,564 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 [2022-01-11 05:29:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:29:57,610 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 [2022-01-11 05:29:57,653 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 [2022-01-11 05:29:57,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:29:57,656 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 28 treesize of output 27 [2022-01-11 05:29:57,811 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 42 treesize of output 26 [2022-01-11 05:29:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:29:57,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:29:57,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 16 [2022-01-11 05:29:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-11 05:29:57,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:29:58,027 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 86 treesize of output 82 [2022-01-11 05:29:58,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:29:58,225 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 49329 treesize of output 47394 [2022-01-11 05:29:59,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2022-01-11 05:29:59,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-11 05:29:59,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-01-11 05:29:59,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447055664] [2022-01-11 05:29:59,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-11 05:29:59,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 05:29:59,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:29:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 05:29:59,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2022-01-11 05:29:59,917 INFO L87 Difference]: Start difference. First operand 145 states and 183 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:30:00,089 INFO L93 Difference]: Finished difference Result 293 states and 373 transitions. [2022-01-11 05:30:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 05:30:00,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-11 05:30:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:30:00,091 INFO L225 Difference]: With dead ends: 293 [2022-01-11 05:30:00,091 INFO L226 Difference]: Without dead ends: 182 [2022-01-11 05:30:00,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-11 05:30:00,092 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 87 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:30:00,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 317 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:30:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-11 05:30:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 148. [2022-01-11 05:30:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.2653061224489797) internal successors, (186), 147 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 186 transitions. [2022-01-11 05:30:00,119 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 186 transitions. Word has length 36 [2022-01-11 05:30:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:30:00,119 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 186 transitions. [2022-01-11 05:30:00,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 186 transitions. [2022-01-11 05:30:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 05:30:00,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:30:00,121 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-01-11 05:30:00,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 05:30:00,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:30:00,339 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:30:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:30:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2074006926, now seen corresponding path program 3 times [2022-01-11 05:30:00,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:30:00,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650540221] [2022-01-11 05:30:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:30:00,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:30:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:30:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:30:00,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:30:00,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650540221] [2022-01-11 05:30:00,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650540221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:30:00,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003059949] [2022-01-11 05:30:00,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 05:30:00,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:30:00,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:30:00,443 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:30:00,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 05:30:00,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-11 05:30:00,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:30:00,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-11 05:30:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:30:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:30:01,029 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 [2022-01-11 05:30:01,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:30:01,070 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 [2022-01-11 05:30:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:30:01,111 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 [2022-01-11 05:30:01,114 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 [2022-01-11 05:30:01,284 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 42 treesize of output 26 [2022-01-11 05:30:01,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:30:01,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:30:01,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 16 [2022-01-11 05:30:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:30:01,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:30:01,530 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 117 treesize of output 109 [2022-01-11 05:30:01,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:30:02,107 INFO L353 Elim1Store]: treesize reduction 228, result has 55.5 percent of original size [2022-01-11 05:30:02,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 55076 treesize of output 52884 [2022-01-11 05:30:04,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2022-01-11 05:30:04,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-11 05:30:04,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2022-01-11 05:30:04,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442005356] [2022-01-11 05:30:04,835 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-11 05:30:04,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 05:30:04,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:30:04,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 05:30:04,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-01-11 05:30:04,835 INFO L87 Difference]: Start difference. First operand 148 states and 186 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:30:04,967 INFO L93 Difference]: Finished difference Result 317 states and 401 transitions. [2022-01-11 05:30:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:30:04,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 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 36 [2022-01-11 05:30:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:30:04,968 INFO L225 Difference]: With dead ends: 317 [2022-01-11 05:30:04,968 INFO L226 Difference]: Without dead ends: 185 [2022-01-11 05:30:04,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-11 05:30:04,972 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 69 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:30:04,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 182 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 05:30:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-11 05:30:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 151. [2022-01-11 05:30:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.26) internal successors, (189), 150 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2022-01-11 05:30:04,998 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 36 [2022-01-11 05:30:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:30:05,000 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2022-01-11 05:30:05,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2022-01-11 05:30:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-11 05:30:05,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:30:05,002 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:30:05,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-11 05:30:05,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:30:05,203 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:30:05,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:30:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1541936178, now seen corresponding path program 2 times [2022-01-11 05:30:05,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:30:05,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951641058] [2022-01-11 05:30:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:30:05,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:30:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:30:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:30:05,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:30:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951641058] [2022-01-11 05:30:05,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951641058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:30:05,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288535360] [2022-01-11 05:30:05,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:30:05,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:30:05,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:30:05,397 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:30:05,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 05:30:06,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:30:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:30:06,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-11 05:30:06,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:30:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:30:06,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:30:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:30:10,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288535360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:30:10,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:30:10,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 27 [2022-01-11 05:30:10,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782479866] [2022-01-11 05:30:10,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:30:10,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-11 05:30:10,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:30:10,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-11 05:30:10,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-01-11 05:30:10,676 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:30:11,056 INFO L93 Difference]: Finished difference Result 200 states and 252 transitions. [2022-01-11 05:30:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 05:30:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 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 39 [2022-01-11 05:30:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:30:11,058 INFO L225 Difference]: With dead ends: 200 [2022-01-11 05:30:11,058 INFO L226 Difference]: Without dead ends: 122 [2022-01-11 05:30:11,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2022-01-11 05:30:11,061 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 446 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 05:30:11,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 711 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 05:30:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-11 05:30:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2022-01-11 05:30:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2022-01-11 05:30:11,080 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 39 [2022-01-11 05:30:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:30:11,081 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2022-01-11 05:30:11,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2022-01-11 05:30:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-11 05:30:11,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:30:11,082 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, 1] [2022-01-11 05:30:11,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 05:30:11,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:30:11,287 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:30:11,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:30:11,288 INFO L85 PathProgramCache]: Analyzing trace with hash 744913006, now seen corresponding path program 4 times [2022-01-11 05:30:11,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:30:11,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920528709] [2022-01-11 05:30:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:30:11,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:30:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:30:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:30:11,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:30:11,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920528709] [2022-01-11 05:30:11,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920528709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:30:11,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834327122] [2022-01-11 05:30:11,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 05:30:11,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:30:11,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:30:11,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:30:11,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 05:30:12,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 05:30:12,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:30:12,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-11 05:30:12,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:30:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:30:12,456 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 [2022-01-11 05:30:12,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:30:12,512 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 [2022-01-11 05:30:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:30:12,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:30:12,569 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 31 treesize of output 33 [2022-01-11 05:30:12,572 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 [2022-01-11 05:30:12,692 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 57 treesize of output 37 [2022-01-11 05:30:12,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:30:12,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-11 05:30:12,807 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-11 05:30:12,807 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 52 treesize of output 19 [2022-01-11 05:30:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-11 05:30:12,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:30:12,940 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 117 treesize of output 109 [2022-01-11 05:30:13,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:30:13,535 INFO L353 Elim1Store]: treesize reduction 228, result has 55.2 percent of original size [2022-01-11 05:30:13,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 33936 treesize of output 32429 [2022-01-11 05:30:14,930 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2022-01-11 05:30:14,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-11 05:30:14,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-11 05:30:14,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848967846] [2022-01-11 05:30:14,930 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-11 05:30:14,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-11 05:30:14,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:30:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-11 05:30:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-01-11 05:30:14,931 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:30:15,463 INFO L93 Difference]: Finished difference Result 222 states and 268 transitions. [2022-01-11 05:30:15,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 05:30:15,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-11 05:30:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:30:15,464 INFO L225 Difference]: With dead ends: 222 [2022-01-11 05:30:15,464 INFO L226 Difference]: Without dead ends: 169 [2022-01-11 05:30:15,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-01-11 05:30:15,465 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 119 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 05:30:15,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 613 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 05:30:15,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-11 05:30:15,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 108. [2022-01-11 05:30:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 107 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2022-01-11 05:30:15,480 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 39 [2022-01-11 05:30:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:30:15,480 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2022-01-11 05:30:15,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2022-01-11 05:30:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-11 05:30:15,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:30:15,481 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, 1] [2022-01-11 05:30:15,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-11 05:30:15,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:30:15,695 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:30:15,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:30:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash 963449006, now seen corresponding path program 5 times [2022-01-11 05:30:15,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:30:15,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234714081] [2022-01-11 05:30:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:30:15,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:30:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:30:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:30:15,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:30:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234714081] [2022-01-11 05:30:15,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234714081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:30:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760793726] [2022-01-11 05:30:15,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 05:30:15,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:30:15,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:30:15,831 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:30:15,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-11 05:30:18,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-11 05:30:18,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:30:18,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-11 05:30:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:30:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:30:19,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:30:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:30:31,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760793726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:30:31,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:30:31,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 13] total 25 [2022-01-11 05:30:31,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426585195] [2022-01-11 05:30:31,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:30:31,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-11 05:30:31,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:30:31,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-11 05:30:31,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-01-11 05:30:31,904 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:30:53,348 INFO L93 Difference]: Finished difference Result 257 states and 305 transitions. [2022-01-11 05:30:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-11 05:30:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 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 39 [2022-01-11 05:30:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:30:53,349 INFO L225 Difference]: With dead ends: 257 [2022-01-11 05:30:53,349 INFO L226 Difference]: Without dead ends: 178 [2022-01-11 05:30:53,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=564, Invalid=1787, Unknown=1, NotChecked=0, Total=2352 [2022-01-11 05:30:53,350 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 500 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-11 05:30:53,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 619 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 208 Invalid, 0 Unknown, 135 Unchecked, 1.0s Time] [2022-01-11 05:30:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-11 05:30:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 123. [2022-01-11 05:30:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 122 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:53,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2022-01-11 05:30:53,372 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 39 [2022-01-11 05:30:53,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:30:53,372 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2022-01-11 05:30:53,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:30:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2022-01-11 05:30:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-11 05:30:53,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:30:53,373 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, 1] [2022-01-11 05:30:53,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-11 05:30:53,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-11 05:30:53,579 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:30:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:30:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash 199004270, now seen corresponding path program 6 times [2022-01-11 05:30:53,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:30:53,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386610248] [2022-01-11 05:30:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:30:53,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:30:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:30:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:30:53,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:30:53,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386610248] [2022-01-11 05:30:53,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386610248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:30:53,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389532442] [2022-01-11 05:30:53,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-11 05:30:53,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:30:53,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:30:53,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:30:53,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-11 05:30:54,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-11 05:30:54,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:30:54,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 05:30:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:30:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:30:54,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:30:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:30:54,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389532442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:30:54,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:30:54,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2022-01-11 05:30:54,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126230751] [2022-01-11 05:30:54,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:30:54,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 05:30:54,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:30:54,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 05:30:54,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-11 05:30:54,982 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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)