./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_szymanski.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-pthread/cs_szymanski.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c5cb1d1ec86f1df708ae47d652aad74925d4eb7bf3fc3a2c37d76896a5071e8 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:27:19,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:27:19,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:27:19,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:27:19,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:27:19,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:27:19,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:27:19,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:27:19,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:27:19,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:27:19,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:27:19,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:27:19,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:27:19,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:27:19,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:27:19,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:27:19,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:27:19,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:27:19,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:27:19,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:27:19,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:27:19,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:27:19,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:27:19,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:27:19,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:27:19,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:27:19,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:27:19,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:27:19,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:27:19,628 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:27:19,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:27:19,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:27:19,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:27:19,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:27:19,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:27:19,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:27:19,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:27:19,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:27:19,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:27:19,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:27:19,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:27:19,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:27:19,667 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:27:19,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:27:19,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:27:19,668 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:27:19,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:27:19,669 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:27:19,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:27:19,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:27:19,669 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:27:19,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:27:19,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:27:19,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:27:19,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:27:19,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:27:19,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:27:19,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:27:19,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:27:19,672 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:27:19,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:27:19,672 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:27:19,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:27:19,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:27:19,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:27:19,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:27:19,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:27:19,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:27:19,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:27:19,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:27:19,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:27:19,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:27:19,675 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:27:19,675 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:27:19,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:27:19,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:27:19,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c5cb1d1ec86f1df708ae47d652aad74925d4eb7bf3fc3a2c37d76896a5071e8 [2021-12-14 15:27:19,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:27:19,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:27:19,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:27:19,950 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:27:19,951 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:27:19,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_szymanski.i [2021-12-14 15:27:20,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868bc60ca/d1feb5c3062a453f9c9592bb06ae66da/FLAG4b73cff68 [2021-12-14 15:27:20,383 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:27:20,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_szymanski.i [2021-12-14 15:27:20,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868bc60ca/d1feb5c3062a453f9c9592bb06ae66da/FLAG4b73cff68 [2021-12-14 15:27:20,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/868bc60ca/d1feb5c3062a453f9c9592bb06ae66da [2021-12-14 15:27:20,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:27:20,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:27:20,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:27:20,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:27:20,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:27:20,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:27:20" (1/1) ... [2021-12-14 15:27:20,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12eec71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:20, skipping insertion in model container [2021-12-14 15:27:20,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:27:20" (1/1) ... [2021-12-14 15:27:20,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:27:20,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:27:21,092 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_szymanski.i[23606,23619] [2021-12-14 15:27:21,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:27:21,229 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:27:21,266 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_szymanski.i[23606,23619] [2021-12-14 15:27:21,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:27:21,344 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:27:21,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21 WrapperNode [2021-12-14 15:27:21,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:27:21,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:27:21,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:27:21,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:27:21,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,443 INFO L137 Inliner]: procedures = 145, calls = 289, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 395 [2021-12-14 15:27:21,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:27:21,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:27:21,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:27:21,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:27:21,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:27:21,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:27:21,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:27:21,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:27:21,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (1/1) ... [2021-12-14 15:27:21,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:27:21,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:27:21,562 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) [2021-12-14 15:27:21,571 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 [2021-12-14 15:27:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 15:27:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 15:27:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 15:27:21,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 15:27:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:27:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 15:27:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 15:27:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-12-14 15:27:21,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-12-14 15:27:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 15:27:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-12-14 15:27:21,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-12-14 15:27:21,592 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-14 15:27:21,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-14 15:27:21,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 15:27:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 15:27:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-12-14 15:27:21,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-12-14 15:27:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:27:21,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:27:21,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:27:21,746 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:27:21,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:27:24,306 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:27:24,312 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:27:24,312 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 15:27:24,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:27:24 BoogieIcfgContainer [2021-12-14 15:27:24,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:27:24,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:27:24,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:27:24,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:27:24,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:27:20" (1/3) ... [2021-12-14 15:27:24,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55633aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:27:24, skipping insertion in model container [2021-12-14 15:27:24,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:21" (2/3) ... [2021-12-14 15:27:24,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55633aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:27:24, skipping insertion in model container [2021-12-14 15:27:24,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:27:24" (3/3) ... [2021-12-14 15:27:24,324 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_szymanski.i [2021-12-14 15:27:24,328 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:27:24,329 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:27:24,365 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:27:24,371 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 [2021-12-14 15:27:24,372 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:27:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 73 states have internal predecessors, (96), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-14 15:27:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-14 15:27:24,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:27:24,403 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:27:24,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:27:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:27:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1875977801, now seen corresponding path program 1 times [2021-12-14 15:27:24,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:27:24,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527947610] [2021-12-14 15:27:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:24,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:27:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 15:27:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 15:27:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 15:27:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 15:27:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-14 15:27:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 15:27:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-14 15:27:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 15:27:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 15:27:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 15:27:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-14 15:27:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 15:27:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-14 15:27:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 15:27:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-14 15:27:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 15:27:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-14 15:27:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-14 15:27:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-14 15:27:25,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:27:25,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527947610] [2021-12-14 15:27:25,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527947610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:27:25,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:27:25,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:27:25,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214310586] [2021-12-14 15:27:25,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:27:25,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:27:25,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:27:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:27:25,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:27:25,460 INFO L87 Difference]: Start difference. First operand has 111 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 73 states have internal predecessors, (96), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-14 15:27:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:27:25,521 INFO L93 Difference]: Finished difference Result 224 states and 356 transitions. [2021-12-14 15:27:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:27:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 120 [2021-12-14 15:27:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:27:25,534 INFO L225 Difference]: With dead ends: 224 [2021-12-14 15:27:25,535 INFO L226 Difference]: Without dead ends: 111 [2021-12-14 15:27:25,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:27:25,544 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 4 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:27:25,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 304 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:27:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-14 15:27:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-12-14 15:27:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-14 15:27:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-12-14 15:27:25,598 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 120 [2021-12-14 15:27:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:27:25,598 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-12-14 15:27:25,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-14 15:27:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-12-14 15:27:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-14 15:27:25,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:27:25,605 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:27:25,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:27:25,606 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:27:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:27:25,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1912175905, now seen corresponding path program 1 times [2021-12-14 15:27:25,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:27:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372357412] [2021-12-14 15:27:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:25,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:27:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-14 15:27:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 15:27:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 15:27:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 15:27:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 15:27:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 15:27:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 15:27:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 15:27:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 15:27:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:27:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:27:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 15:27:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:25,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:27:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 15:27:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 15:27:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 15:27:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 15:27:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 15:27:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-14 15:27:26,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:27:26,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372357412] [2021-12-14 15:27:26,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372357412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:27:26,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:27:26,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:27:26,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390191617] [2021-12-14 15:27:26,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:27:26,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:27:26,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:27:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:27:26,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:27:26,030 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-14 15:27:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:27:26,064 INFO L93 Difference]: Finished difference Result 215 states and 306 transitions. [2021-12-14 15:27:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:27:26,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 123 [2021-12-14 15:27:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:27:26,066 INFO L225 Difference]: With dead ends: 215 [2021-12-14 15:27:26,066 INFO L226 Difference]: Without dead ends: 110 [2021-12-14 15:27:26,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:27:26,069 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 1 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:27:26,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 297 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:27:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-14 15:27:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-12-14 15:27:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-14 15:27:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2021-12-14 15:27:26,081 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 123 [2021-12-14 15:27:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:27:26,081 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2021-12-14 15:27:26,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-14 15:27:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2021-12-14 15:27:26,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-14 15:27:26,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:27:26,084 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:27:26,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:27:26,084 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:27:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:27:26,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1930143839, now seen corresponding path program 1 times [2021-12-14 15:27:26,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:27:26,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969311538] [2021-12-14 15:27:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:26,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:27:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:27:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:27:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 15:27:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 15:27:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 15:27:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:27:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-14 15:27:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-14 15:27:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-14 15:27:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:27:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 15:27:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-14 15:27:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:27:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 15:27:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 15:27:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-14 15:27:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-14 15:27:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:27:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-14 15:27:26,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:27:26,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969311538] [2021-12-14 15:27:26,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969311538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:27:26,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83273009] [2021-12-14 15:27:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:26,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:27:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:27:26,519 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) [2021-12-14 15:27:26,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:27:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 4528 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:27:27,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:27:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-14 15:27:28,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:27:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-14 15:27:28,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83273009] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:27:28,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 15:27:28,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-14 15:27:28,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937117124] [2021-12-14 15:27:28,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 15:27:28,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:27:28,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:27:28,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:27:28,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:27:28,519 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2021-12-14 15:27:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:27:28,578 INFO L93 Difference]: Finished difference Result 219 states and 311 transitions. [2021-12-14 15:27:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:27:28,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) Word has length 125 [2021-12-14 15:27:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:27:28,583 INFO L225 Difference]: With dead ends: 219 [2021-12-14 15:27:28,583 INFO L226 Difference]: Without dead ends: 113 [2021-12-14 15:27:28,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:27:28,587 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 3 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:27:28,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 297 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:27:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-14 15:27:28,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-12-14 15:27:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 75 states have internal predecessors, (94), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-14 15:27:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2021-12-14 15:27:28,606 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 125 [2021-12-14 15:27:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:27:28,606 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2021-12-14 15:27:28,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2021-12-14 15:27:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2021-12-14 15:27:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-14 15:27:28,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:27:28,612 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:27:28,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 15:27:28,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:27:28,836 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:27:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:27:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash -28203099, now seen corresponding path program 2 times [2021-12-14 15:27:28,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:27:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57336760] [2021-12-14 15:27:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:28,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:27:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-14 15:27:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 15:27:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 15:27:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-14 15:27:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 15:27:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-14 15:27:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-14 15:27:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-14 15:27:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:27:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:27:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-14 15:27:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:27:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-14 15:27:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-14 15:27:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 15:27:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-14 15:27:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 15:27:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-14 15:27:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-12-14 15:27:29,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:27:29,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57336760] [2021-12-14 15:27:29,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57336760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:27:29,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011412974] [2021-12-14 15:27:29,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 15:27:29,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:27:29,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:27:29,457 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) [2021-12-14 15:27:29,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 15:27:31,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 15:27:31,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 15:27:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 4196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 15:27:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:27:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2021-12-14 15:27:31,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:27:31,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011412974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:27:31,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:27:31,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-14 15:27:31,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499780321] [2021-12-14 15:27:31,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:27:31,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:27:31,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:27:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:27:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:27:31,614 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-14 15:27:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:27:31,639 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2021-12-14 15:27:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:27:31,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 129 [2021-12-14 15:27:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:27:31,649 INFO L225 Difference]: With dead ends: 211 [2021-12-14 15:27:31,650 INFO L226 Difference]: Without dead ends: 169 [2021-12-14 15:27:31,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:27:31,652 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 77 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:27:31,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 528 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:27:31,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-14 15:27:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-14 15:27:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 113 states have (on average 1.2920353982300885) internal successors, (146), 113 states have internal predecessors, (146), 45 states have call successors, (45), 10 states have call predecessors, (45), 10 states have return successors, (49), 45 states have call predecessors, (49), 45 states have call successors, (49) [2021-12-14 15:27:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 240 transitions. [2021-12-14 15:27:31,685 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 240 transitions. Word has length 129 [2021-12-14 15:27:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:27:31,686 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 240 transitions. [2021-12-14 15:27:31,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-14 15:27:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 240 transitions. [2021-12-14 15:27:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-14 15:27:31,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:27:31,709 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:27:31,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 15:27:31,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-14 15:27:31,932 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:27:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:27:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash -993819535, now seen corresponding path program 1 times [2021-12-14 15:27:31,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:27:31,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806568722] [2021-12-14 15:27:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:31,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:27:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 15:27:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 15:27:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:27:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 15:27:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 15:27:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 15:27:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 15:27:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 15:27:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-14 15:27:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-14 15:27:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:27:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 15:27:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-14 15:27:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 15:27:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-14 15:27:32,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-14 15:27:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:27:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-14 15:27:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-14 15:27:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-14 15:27:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-14 15:27:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-14 15:27:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-14 15:27:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-14 15:27:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-14 15:27:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2021-12-14 15:27:32,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:27:32,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806568722] [2021-12-14 15:27:32,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806568722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:27:32,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99862962] [2021-12-14 15:27:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:32,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:27:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:27:32,600 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) [2021-12-14 15:27:32,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 15:27:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:34,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 4997 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:27:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:27:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2021-12-14 15:27:34,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:27:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2021-12-14 15:27:35,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99862962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:27:35,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 15:27:35,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2021-12-14 15:27:35,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806096039] [2021-12-14 15:27:35,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 15:27:35,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 15:27:35,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:27:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 15:27:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-14 15:27:35,083 INFO L87 Difference]: Start difference. First operand 169 states and 240 transitions. Second operand has 10 states, 10 states have (on average 10.2) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (62), 6 states have call predecessors, (62), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-12-14 15:27:37,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 15:27:39,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 15:27:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:27:39,561 INFO L93 Difference]: Finished difference Result 354 states and 502 transitions. [2021-12-14 15:27:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:27:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.2) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (62), 6 states have call predecessors, (62), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 206 [2021-12-14 15:27:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:27:39,563 INFO L225 Difference]: With dead ends: 354 [2021-12-14 15:27:39,564 INFO L226 Difference]: Without dead ends: 197 [2021-12-14 15:27:39,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 467 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:27:39,565 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 79 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 139 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:27:39,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 394 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-12-14 15:27:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-14 15:27:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 192. [2021-12-14 15:27:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.2611940298507462) internal successors, (169), 136 states have internal predecessors, (169), 45 states have call successors, (45), 10 states have call predecessors, (45), 12 states have return successors, (53), 45 states have call predecessors, (53), 45 states have call successors, (53) [2021-12-14 15:27:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 267 transitions. [2021-12-14 15:27:39,581 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 267 transitions. Word has length 206 [2021-12-14 15:27:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:27:39,581 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 267 transitions. [2021-12-14 15:27:39,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.2) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (62), 6 states have call predecessors, (62), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-12-14 15:27:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 267 transitions. [2021-12-14 15:27:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-14 15:27:39,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:27:39,584 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 9, 9, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:27:39,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 15:27:39,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:27:39,799 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:27:39,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:27:39,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1193364367, now seen corresponding path program 2 times [2021-12-14 15:27:39,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:27:39,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290836816] [2021-12-14 15:27:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:39,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:27:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:40,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 15:27:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:40,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:40,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 15:27:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:27:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 15:27:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 15:27:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 15:27:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 15:27:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:27:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-14 15:27:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-14 15:27:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-14 15:27:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-14 15:27:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-14 15:27:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:27:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-14 15:27:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-14 15:27:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-14 15:27:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-14 15:27:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-14 15:27:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-14 15:27:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-14 15:27:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-14 15:27:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-12-14 15:27:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-14 15:27:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-14 15:27:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2021-12-14 15:27:41,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:27:41,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290836816] [2021-12-14 15:27:41,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290836816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:27:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331777883] [2021-12-14 15:27:41,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 15:27:41,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:27:41,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:27:41,183 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) [2021-12-14 15:27:41,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 15:27:43,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 15:27:43,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 15:27:43,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 4282 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 15:27:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:27:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-12-14 15:27:43,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:27:43,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331777883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:27:43,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:27:43,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2021-12-14 15:27:43,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472575499] [2021-12-14 15:27:43,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:27:43,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:27:43,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:27:43,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:27:43,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:27:43,643 INFO L87 Difference]: Start difference. First operand 192 states and 267 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2021-12-14 15:27:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:27:43,668 INFO L93 Difference]: Finished difference Result 344 states and 482 transitions. [2021-12-14 15:27:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:27:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 224 [2021-12-14 15:27:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:27:43,672 INFO L225 Difference]: With dead ends: 344 [2021-12-14 15:27:43,673 INFO L226 Difference]: Without dead ends: 192 [2021-12-14 15:27:43,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:27:43,674 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:27:43,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:27:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-14 15:27:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-12-14 15:27:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.2537313432835822) internal successors, (168), 136 states have internal predecessors, (168), 45 states have call successors, (45), 10 states have call predecessors, (45), 12 states have return successors, (53), 45 states have call predecessors, (53), 45 states have call successors, (53) [2021-12-14 15:27:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 266 transitions. [2021-12-14 15:27:43,686 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 266 transitions. Word has length 224 [2021-12-14 15:27:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:27:43,687 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 266 transitions. [2021-12-14 15:27:43,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2021-12-14 15:27:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 266 transitions. [2021-12-14 15:27:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-14 15:27:43,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:27:43,694 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 9, 9, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:27:43,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-14 15:27:43,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:27:43,914 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:27:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:27:43,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1496592282, now seen corresponding path program 1 times [2021-12-14 15:27:43,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:27:43,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864188240] [2021-12-14 15:27:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:43,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:27:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:44,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 15:27:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:44,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:44,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:44,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 15:27:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:44,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:44,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:44,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 15:27:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:27:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-14 15:27:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 15:27:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-14 15:27:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-14 15:27:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 15:27:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-14 15:27:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-14 15:27:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:27:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 15:27:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-14 15:27:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-14 15:27:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-14 15:27:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-14 15:27:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-14 15:27:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-14 15:27:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-14 15:27:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-14 15:27:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-12-14 15:27:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-14 15:27:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2021-12-14 15:27:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-12-14 15:27:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-12-14 15:27:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2021-12-14 15:27:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2021-12-14 15:27:45,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:27:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864188240] [2021-12-14 15:27:45,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864188240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:27:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538645845] [2021-12-14 15:27:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:27:45,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:27:45,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:27:45,106 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) [2021-12-14 15:27:45,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 15:27:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:27:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 5430 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 15:27:47,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:27:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 374 proven. 21 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2021-12-14 15:27:47,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 15:27:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2021-12-14 15:27:48,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538645845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 15:27:48,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 15:27:48,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2021-12-14 15:27:48,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226792923] [2021-12-14 15:27:48,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 15:27:48,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 15:27:48,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:27:48,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 15:27:48,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-12-14 15:27:48,686 INFO L87 Difference]: Start difference. First operand 192 states and 266 transitions. Second operand has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 21 states have internal predecessors, (118), 15 states have call successors, (62), 12 states have call predecessors, (62), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2021-12-14 15:27:50,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 15:27:52,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 15:27:54,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 15:27:56,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 15:28:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:28:01,923 INFO L93 Difference]: Finished difference Result 1037 states and 1615 transitions. [2021-12-14 15:28:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-14 15:28:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 21 states have internal predecessors, (118), 15 states have call successors, (62), 12 states have call predecessors, (62), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) Word has length 244 [2021-12-14 15:28:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:28:01,930 INFO L225 Difference]: With dead ends: 1037 [2021-12-14 15:28:01,931 INFO L226 Difference]: Without dead ends: 878 [2021-12-14 15:28:01,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3881 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1769, Invalid=9787, Unknown=0, NotChecked=0, Total=11556 [2021-12-14 15:28:01,947 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 1102 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 1383 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1383 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:28:01,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1216 Invalid, 3909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1383 Valid, 2522 Invalid, 4 Unknown, 0 Unchecked, 10.8s Time] [2021-12-14 15:28:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-14 15:28:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 547. [2021-12-14 15:28:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 376 states have (on average 1.25) internal successors, (470), 381 states have internal predecessors, (470), 108 states have call successors, (108), 50 states have call predecessors, (108), 62 states have return successors, (178), 115 states have call predecessors, (178), 108 states have call successors, (178) [2021-12-14 15:28:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 756 transitions. [2021-12-14 15:28:02,024 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 756 transitions. Word has length 244 [2021-12-14 15:28:02,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:28:02,024 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 756 transitions. [2021-12-14 15:28:02,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 21 states have internal predecessors, (118), 15 states have call successors, (62), 12 states have call predecessors, (62), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2021-12-14 15:28:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 756 transitions. [2021-12-14 15:28:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-14 15:28:02,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:28:02,029 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 9, 9, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:28:02,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 15:28:02,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:28:02,243 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:28:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:28:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1922354694, now seen corresponding path program 1 times [2021-12-14 15:28:02,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:28:02,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959687332] [2021-12-14 15:28:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:28:02,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms