./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/transpose-u.c --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/array-multidimensional/transpose-u.c -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 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:28:50,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:28:50,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:28:50,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:28:50,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:28:50,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:28:50,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:28:50,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:28:50,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:28:50,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:28:50,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:28:50,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:28:50,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:28:50,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:28:50,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:28:50,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:28:50,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:28:50,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:28:50,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:28:50,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:28:50,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:28:50,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:28:50,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:28:50,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:28:50,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:28:50,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:28:50,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:28:50,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:28:50,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:28:50,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:28:50,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:28:50,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:28:50,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:28:50,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:28:50,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:28:50,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:28:50,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:28:50,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:28:50,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:28:50,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:28:50,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:28:50,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:28:50,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:28:50,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:28:50,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:28:50,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:28:50,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:28:50,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:28:50,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:28:50,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:28:50,719 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:28:50,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:28:50,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:28:50,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:28:50,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:28:50,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:28:50,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:28:50,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:28:50,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:28:50,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:28:50,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:28:50,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:28:50,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:28:50,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:28:50,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:28:50,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:28:50,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:28:50,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:28:50,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:28:50,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:28:50,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:28:50,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:28:50,724 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:28:50,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:28:50,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:28:50,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:28:50,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 [2021-12-14 11:28:50,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:28:50,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:28:50,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:28:50,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:28:50,925 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:28:50,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/transpose-u.c [2021-12-14 11:28:50,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef64d20a4/5c5a0b8d09a14bc8bf7b2b525e4edef7/FLAG1587a9949 [2021-12-14 11:28:51,349 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:28:51,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/transpose-u.c [2021-12-14 11:28:51,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef64d20a4/5c5a0b8d09a14bc8bf7b2b525e4edef7/FLAG1587a9949 [2021-12-14 11:28:51,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef64d20a4/5c5a0b8d09a14bc8bf7b2b525e4edef7 [2021-12-14 11:28:51,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:28:51,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:28:51,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:28:51,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:28:51,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:28:51,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a69ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51, skipping insertion in model container [2021-12-14 11:28:51,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:28:51,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:28:51,521 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/array-multidimensional/transpose-u.c[315,328] [2021-12-14 11:28:51,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:28:51,543 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:28:51,552 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/array-multidimensional/transpose-u.c[315,328] [2021-12-14 11:28:51,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:28:51,576 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:28:51,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51 WrapperNode [2021-12-14 11:28:51,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:28:51,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:28:51,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:28:51,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:28:51,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,611 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2021-12-14 11:28:51,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:28:51,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:28:51,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:28:51,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:28:51,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:28:51,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:28:51,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:28:51,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:28:51,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (1/1) ... [2021-12-14 11:28:51,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:28:51,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:51,676 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 11:28:51,695 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 11:28:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:28:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:28:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:28:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:28:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:28:51,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:28:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:28:51,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:28:51,746 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:28:51,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:28:51,842 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:28:51,846 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:28:51,846 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-14 11:28:51,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:28:51 BoogieIcfgContainer [2021-12-14 11:28:51,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:28:51,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:28:51,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:28:51,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:28:51,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:28:51" (1/3) ... [2021-12-14 11:28:51,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c543ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:28:51, skipping insertion in model container [2021-12-14 11:28:51,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:28:51" (2/3) ... [2021-12-14 11:28:51,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c543ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:28:51, skipping insertion in model container [2021-12-14 11:28:51,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:28:51" (3/3) ... [2021-12-14 11:28:51,853 INFO L111 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2021-12-14 11:28:51,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:28:51,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:28:51,899 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:28:51,916 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 11:28:51,931 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:28:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:51,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 11:28:51,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:28:51,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:28:51,953 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:28:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:28:51,959 INFO L85 PathProgramCache]: Analyzing trace with hash 74794164, now seen corresponding path program 1 times [2021-12-14 11:28:51,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:28:51,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089224136] [2021-12-14 11:28:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:51,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:28:52,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:28:52,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631093004] [2021-12-14 11:28:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:52,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:52,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:52,058 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 11:28:52,059 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 11:28:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:28:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 11:28:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:28:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:28:52,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:28:52,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:28:52,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089224136] [2021-12-14 11:28:52,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:28:52,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631093004] [2021-12-14 11:28:52,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631093004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:28:52,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:28:52,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:28:52,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795118053] [2021-12-14 11:28:52,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:28:52,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:28:52,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:28:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:28:52,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:28:52,230 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:28:52,269 INFO L93 Difference]: Finished difference Result 48 states and 76 transitions. [2021-12-14 11:28:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:28:52,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 11:28:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:28:52,277 INFO L225 Difference]: With dead ends: 48 [2021-12-14 11:28:52,277 INFO L226 Difference]: Without dead ends: 23 [2021-12-14 11:28:52,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 11:28:52,282 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:28:52,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:28:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-14 11:28:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-12-14 11:28:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-12-14 11:28:52,318 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2021-12-14 11:28:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:28:52,318 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-12-14 11:28:52,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-12-14 11:28:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 11:28:52,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:28:52,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:28:52,339 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 11:28:52,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-14 11:28:52,537 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:28:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:28:52,538 INFO L85 PathProgramCache]: Analyzing trace with hash 876166624, now seen corresponding path program 1 times [2021-12-14 11:28:52,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:28:52,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530838410] [2021-12-14 11:28:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:52,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:28:52,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:28:52,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020745337] [2021-12-14 11:28:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:52,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:52,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:52,547 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 11:28:52,549 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 11:28:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:28:52,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 11:28:52,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:28:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:28:52,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:28:52,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:28:52,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530838410] [2021-12-14 11:28:52,642 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:28:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020745337] [2021-12-14 11:28:52,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020745337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:28:52,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:28:52,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:28:52,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759848192] [2021-12-14 11:28:52,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:28:52,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:28:52,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:28:52,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:28:52,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:28:52,644 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:28:52,691 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-12-14 11:28:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:28:52,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-14 11:28:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:28:52,695 INFO L225 Difference]: With dead ends: 49 [2021-12-14 11:28:52,695 INFO L226 Difference]: Without dead ends: 32 [2021-12-14 11:28:52,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:28:52,698 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:28:52,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:28:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-14 11:28:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-12-14 11:28:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-12-14 11:28:52,703 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2021-12-14 11:28:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:28:52,703 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-12-14 11:28:52,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-12-14 11:28:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 11:28:52,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:28:52,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:28:52,723 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 11:28:52,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-14 11:28:52,920 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:28:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:28:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1798277150, now seen corresponding path program 1 times [2021-12-14 11:28:52,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:28:52,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743777496] [2021-12-14 11:28:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:52,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:28:52,927 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:28:52,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752989962] [2021-12-14 11:28:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:52,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:52,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:52,929 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 11:28:52,959 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 11:28:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:28:52,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:28:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:28:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:28:53,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:28:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:28:53,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:28:53,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743777496] [2021-12-14 11:28:53,072 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:28:53,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752989962] [2021-12-14 11:28:53,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752989962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:28:53,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:28:53,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-14 11:28:53,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033550150] [2021-12-14 11:28:53,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:28:53,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 11:28:53,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:28:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 11:28:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-14 11:28:53,074 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:28:53,139 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2021-12-14 11:28:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 11:28:53,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-14 11:28:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:28:53,140 INFO L225 Difference]: With dead ends: 73 [2021-12-14 11:28:53,140 INFO L226 Difference]: Without dead ends: 53 [2021-12-14 11:28:53,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-14 11:28:53,141 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:28:53,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 35 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:28:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-14 11:28:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2021-12-14 11:28:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-14 11:28:53,146 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 15 [2021-12-14 11:28:53,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:28:53,147 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-14 11:28:53,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-14 11:28:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 11:28:53,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:28:53,148 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:28:53,166 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 11:28:53,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:53,365 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:28:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:28:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2120756504, now seen corresponding path program 2 times [2021-12-14 11:28:53,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:28:53,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678602103] [2021-12-14 11:28:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:53,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:28:53,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:28:53,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400817557] [2021-12-14 11:28:53,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:28:53,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:53,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:53,376 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 11:28:53,377 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 11:28:53,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 11:28:53,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:28:53,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 11:28:53,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:28:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 11:28:53,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:28:53,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:28:53,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678602103] [2021-12-14 11:28:53,457 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:28:53,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400817557] [2021-12-14 11:28:53,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400817557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:28:53,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:28:53,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:28:53,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639626533] [2021-12-14 11:28:53,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:28:53,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:28:53,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:28:53,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:28:53,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:28:53,459 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:28:53,506 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2021-12-14 11:28:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:28:53,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-14 11:28:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:28:53,516 INFO L225 Difference]: With dead ends: 104 [2021-12-14 11:28:53,516 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 11:28:53,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:28:53,517 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:28:53,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 17 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:28:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 11:28:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 45. [2021-12-14 11:28:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-12-14 11:28:53,525 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 21 [2021-12-14 11:28:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:28:53,525 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-12-14 11:28:53,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-12-14 11:28:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 11:28:53,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:28:53,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:28:53,542 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 11:28:53,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:53,742 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:28:53,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:28:53,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2013197213, now seen corresponding path program 1 times [2021-12-14 11:28:53,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:28:53,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968784163] [2021-12-14 11:28:53,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:53,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:28:53,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:28:53,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505436512] [2021-12-14 11:28:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:53,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:53,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:53,752 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 11:28:53,753 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 11:28:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:28:53,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 11:28:53,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:28:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 11:28:53,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:28:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 11:28:53,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:28:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968784163] [2021-12-14 11:28:53,989 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:28:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505436512] [2021-12-14 11:28:53,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505436512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:28:53,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:28:53,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-14 11:28:53,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510428691] [2021-12-14 11:28:53,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:28:53,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:28:53,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:28:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:28:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:28:53,991 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:28:54,140 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2021-12-14 11:28:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 11:28:54,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-14 11:28:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:28:54,142 INFO L225 Difference]: With dead ends: 147 [2021-12-14 11:28:54,142 INFO L226 Difference]: Without dead ends: 105 [2021-12-14 11:28:54,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-14 11:28:54,143 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:28:54,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 64 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:28:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-14 11:28:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2021-12-14 11:28:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-12-14 11:28:54,150 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 28 [2021-12-14 11:28:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:28:54,150 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-12-14 11:28:54,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-12-14 11:28:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 11:28:54,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:28:54,152 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:28:54,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:28:54,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:54,366 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:28:54,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:28:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2105523119, now seen corresponding path program 2 times [2021-12-14 11:28:54,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:28:54,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921336219] [2021-12-14 11:28:54,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:54,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:28:54,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:28:54,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250297980] [2021-12-14 11:28:54,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:28:54,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:54,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:54,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:28:54,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:28:54,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:28:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:28:54,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 11:28:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:28:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-14 11:28:54,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:28:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-14 11:28:54,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:28:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921336219] [2021-12-14 11:28:54,859 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:28:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250297980] [2021-12-14 11:28:54,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250297980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:28:54,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:28:54,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-14 11:28:54,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844950631] [2021-12-14 11:28:54,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:28:54,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-14 11:28:54,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:28:54,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-14 11:28:54,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-14 11:28:54,861 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:28:55,258 INFO L93 Difference]: Finished difference Result 297 states and 352 transitions. [2021-12-14 11:28:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 11:28:55,259 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-14 11:28:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:28:55,260 INFO L225 Difference]: With dead ends: 297 [2021-12-14 11:28:55,260 INFO L226 Difference]: Without dead ends: 213 [2021-12-14 11:28:55,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 11:28:55,261 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 295 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:28:55,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 147 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 11:28:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-14 11:28:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 171. [2021-12-14 11:28:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 170 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 197 transitions. [2021-12-14 11:28:55,273 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 197 transitions. Word has length 46 [2021-12-14 11:28:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:28:55,273 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 197 transitions. [2021-12-14 11:28:55,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 197 transitions. [2021-12-14 11:28:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-14 11:28:55,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:28:55,275 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:28:55,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 11:28:55,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:55,479 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:28:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:28:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1796874681, now seen corresponding path program 3 times [2021-12-14 11:28:55,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:28:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413249741] [2021-12-14 11:28:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:55,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:28:55,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:28:55,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438887757] [2021-12-14 11:28:55,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:28:55,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:55,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:28:55,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 11:28:55,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 11:28:55,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:28:55,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:28:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:28:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 738 trivial. 0 not checked. [2021-12-14 11:28:55,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:28:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 738 trivial. 0 not checked. [2021-12-14 11:28:55,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:28:55,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413249741] [2021-12-14 11:28:55,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:28:55,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438887757] [2021-12-14 11:28:55,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438887757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:28:55,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:28:55,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-14 11:28:55,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464582836] [2021-12-14 11:28:55,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:28:55,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:28:55,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:28:55,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:28:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:28:55,897 INFO L87 Difference]: Start difference. First operand 171 states and 197 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:28:55,932 INFO L93 Difference]: Finished difference Result 433 states and 489 transitions. [2021-12-14 11:28:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:28:55,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-14 11:28:55,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:28:55,933 INFO L225 Difference]: With dead ends: 433 [2021-12-14 11:28:55,933 INFO L226 Difference]: Without dead ends: 312 [2021-12-14 11:28:55,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:28:55,934 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:28:55,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 24 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:28:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-14 11:28:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-12-14 11:28:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.0964630225080385) internal successors, (341), 311 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 341 transitions. [2021-12-14 11:28:55,948 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 341 transitions. Word has length 82 [2021-12-14 11:28:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:28:55,949 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 341 transitions. [2021-12-14 11:28:55,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 341 transitions. [2021-12-14 11:28:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-14 11:28:55,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:28:55,952 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:28:55,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 11:28:56,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:56,169 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:28:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:28:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash -408047983, now seen corresponding path program 4 times [2021-12-14 11:28:56,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:28:56,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680952947] [2021-12-14 11:28:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:56,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:28:56,202 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:28:56,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365895515] [2021-12-14 11:28:56,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:28:56,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:56,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:56,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:28:56,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 11:28:56,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:28:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:28:56,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-14 11:28:56,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:28:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8284 backedges. 231 proven. 23 refuted. 0 times theorem prover too weak. 8030 trivial. 0 not checked. [2021-12-14 11:28:56,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:28:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8284 backedges. 231 proven. 23 refuted. 0 times theorem prover too weak. 8030 trivial. 0 not checked. [2021-12-14 11:28:57,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:28:57,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680952947] [2021-12-14 11:28:57,420 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 11:28:57,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365895515] [2021-12-14 11:28:57,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365895515] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:28:57,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 11:28:57,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-14 11:28:57,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638476377] [2021-12-14 11:28:57,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 11:28:57,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-14 11:28:57,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:28:57,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-14 11:28:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1100, Invalid=1552, Unknown=0, NotChecked=0, Total=2652 [2021-12-14 11:28:57,423 INFO L87 Difference]: Start difference. First operand 312 states and 341 transitions. Second operand has 52 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 52 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:28:58,998 INFO L93 Difference]: Finished difference Result 849 states and 928 transitions. [2021-12-14 11:28:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-14 11:28:58,998 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 52 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-12-14 11:28:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:28:59,001 INFO L225 Difference]: With dead ends: 849 [2021-12-14 11:28:59,001 INFO L226 Difference]: Without dead ends: 755 [2021-12-14 11:28:59,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4982 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5561, Invalid=9691, Unknown=0, NotChecked=0, Total=15252 [2021-12-14 11:28:59,005 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 446 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 11:28:59,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 729 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 11:28:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-12-14 11:28:59,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 387. [2021-12-14 11:28:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0854922279792747) internal successors, (419), 386 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 419 transitions. [2021-12-14 11:28:59,020 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 419 transitions. Word has length 223 [2021-12-14 11:28:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:28:59,021 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 419 transitions. [2021-12-14 11:28:59,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 52 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:28:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 419 transitions. [2021-12-14 11:28:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-14 11:28:59,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:28:59,026 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:28:59,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 11:28:59,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-14 11:28:59,242 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:28:59,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:28:59,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1641886732, now seen corresponding path program 5 times [2021-12-14 11:28:59,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:28:59,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659405467] [2021-12-14 11:28:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:28:59,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:28:59,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 11:28:59,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921051322] [2021-12-14 11:28:59,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:28:59,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:28:59,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:28:59,309 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 11:28:59,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process