./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/recursive/Ackermann03.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 c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:38:43,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:38:43,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:38:43,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:38:43,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:38:43,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:38:43,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:38:43,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:38:43,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:38:43,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:38:43,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:38:43,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:38:43,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:38:43,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:38:43,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:38:43,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:38:43,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:38:43,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:38:43,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:38:43,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:38:43,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:38:43,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:38:43,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:38:43,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:38:43,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:38:43,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:38:43,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:38:43,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:38:43,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:38:43,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:38:43,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:38:43,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:38:43,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:38:43,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:38:43,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:38:43,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:38:43,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:38:43,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:38:43,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:38:43,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:38:43,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:38:43,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:38:43,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:38:43,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:38:43,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:38:43,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:38:43,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:38:43,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:38:43,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:38:43,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:38:43,585 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:38:43,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:38:43,586 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:38:43,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:38:43,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:38:43,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:38:43,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:38:43,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:38:43,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:38:43,587 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:38:43,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:38:43,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:38:43,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:38:43,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:38:43,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:38:43,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:38:43,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:38:43,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:38:43,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:38:43,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:38:43,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:38:43,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:38:43,589 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:38:43,589 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:38:43,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:38:43,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:38:43,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2021-12-22 11:38:43,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:38:43,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:38:43,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:38:43,814 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:38:43,814 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:38:43,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann03.c [2021-12-22 11:38:43,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200353c07/e8e536c9842c48d7b56f03e2a7906847/FLAG5100ab535 [2021-12-22 11:38:44,201 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:38:44,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c [2021-12-22 11:38:44,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200353c07/e8e536c9842c48d7b56f03e2a7906847/FLAG5100ab535 [2021-12-22 11:38:44,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200353c07/e8e536c9842c48d7b56f03e2a7906847 [2021-12-22 11:38:44,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:38:44,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:38:44,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:38:44,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:38:44,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:38:44,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfc0e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44, skipping insertion in model container [2021-12-22 11:38:44,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:38:44,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:38:44,799 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/recursive/Ackermann03.c[1168,1181] [2021-12-22 11:38:44,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:38:44,806 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:38:44,815 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/recursive/Ackermann03.c[1168,1181] [2021-12-22 11:38:44,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:38:44,823 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:38:44,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44 WrapperNode [2021-12-22 11:38:44,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:38:44,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:38:44,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:38:44,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:38:44,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,841 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-12-22 11:38:44,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:38:44,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:38:44,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:38:44,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:38:44,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:38:44,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:38:44,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:38:44,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:38:44,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (1/1) ... [2021-12-22 11:38:44,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:38:44,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:44,872 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) [2021-12-22 11:38:44,899 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 [2021-12-22 11:38:44,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:38:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:38:44,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:38:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-12-22 11:38:44,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-12-22 11:38:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:38:44,957 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:38:44,959 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:38:45,084 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:38:45,089 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:38:45,108 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 11:38:45,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:38:45 BoogieIcfgContainer [2021-12-22 11:38:45,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:38:45,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:38:45,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:38:45,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:38:45,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:38:44" (1/3) ... [2021-12-22 11:38:45,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c678149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:38:45, skipping insertion in model container [2021-12-22 11:38:45,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:38:44" (2/3) ... [2021-12-22 11:38:45,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c678149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:38:45, skipping insertion in model container [2021-12-22 11:38:45,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:38:45" (3/3) ... [2021-12-22 11:38:45,115 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2021-12-22 11:38:45,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:38:45,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:38:45,167 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:38:45,174 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 [2021-12-22 11:38:45,174 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:38:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 11:38:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 11:38:45,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:45,193 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:45,193 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:45,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2021-12-22 11:38:45,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:45,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684844009] [2021-12-22 11:38:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:45,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:45,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:38:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:38:45,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:45,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684844009] [2021-12-22 11:38:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684844009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:38:45,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:38:45,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:38:45,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992167601] [2021-12-22 11:38:45,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:38:45,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:38:45,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:38:45,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:38:45,405 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 11:38:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:45,478 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-12-22 11:38:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:38:45,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-22 11:38:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:45,486 INFO L225 Difference]: With dead ends: 51 [2021-12-22 11:38:45,487 INFO L226 Difference]: Without dead ends: 25 [2021-12-22 11:38:45,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:38:45,492 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:45,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:38:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-22 11:38:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-22 11:38:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 11:38:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-12-22 11:38:45,523 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2021-12-22 11:38:45,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:45,524 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-12-22 11:38:45,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 11:38:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-12-22 11:38:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 11:38:45,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:45,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:45,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:38:45,528 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2021-12-22 11:38:45,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:45,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884316779] [2021-12-22 11:38:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:45,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:45,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:38:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:45,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:38:45,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:45,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884316779] [2021-12-22 11:38:45,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884316779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:45,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967320974] [2021-12-22 11:38:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:45,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:45,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:45,641 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) [2021-12-22 11:38:45,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:38:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:45,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 11:38:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:38:45,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:38:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:38:45,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967320974] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:38:45,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:38:45,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 11:38:45,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605846798] [2021-12-22 11:38:45,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:38:45,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 11:38:45,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:45,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 11:38:45,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:38:45,894 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 11:38:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:45,989 INFO L93 Difference]: Finished difference Result 74 states and 126 transitions. [2021-12-22 11:38:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:38:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 19 [2021-12-22 11:38:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:45,991 INFO L225 Difference]: With dead ends: 74 [2021-12-22 11:38:45,992 INFO L226 Difference]: Without dead ends: 50 [2021-12-22 11:38:45,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-22 11:38:45,993 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:45,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 92 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:38:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-22 11:38:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-22 11:38:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2021-12-22 11:38:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2021-12-22 11:38:46,004 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 19 [2021-12-22 11:38:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:46,004 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2021-12-22 11:38:46,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 11:38:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2021-12-22 11:38:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 11:38:46,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:46,006 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:46,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 11:38:46,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:46,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 1 times [2021-12-22 11:38:46,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682334992] [2021-12-22 11:38:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:46,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:46,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:38:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:46,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:46,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:46,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:46,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:46,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:38:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-22 11:38:46,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:46,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682334992] [2021-12-22 11:38:46,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682334992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:46,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420215303] [2021-12-22 11:38:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:46,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:46,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:46,397 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) [2021-12-22 11:38:46,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:38:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 11:38:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-22 11:38:46,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:38:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 11:38:46,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420215303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:38:46,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:38:46,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2021-12-22 11:38:46,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665723658] [2021-12-22 11:38:46,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:38:46,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 11:38:46,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 11:38:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:38:46,957 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 6 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-22 11:38:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:47,089 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-12-22 11:38:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:38:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 6 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) Word has length 45 [2021-12-22 11:38:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:47,091 INFO L225 Difference]: With dead ends: 120 [2021-12-22 11:38:47,091 INFO L226 Difference]: Without dead ends: 53 [2021-12-22 11:38:47,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-22 11:38:47,093 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:47,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 83 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:38:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-22 11:38:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-22 11:38:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-22 11:38:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2021-12-22 11:38:47,100 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2021-12-22 11:38:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:47,101 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2021-12-22 11:38:47,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 6 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-22 11:38:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2021-12-22 11:38:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 11:38:47,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:47,110 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:47,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 11:38:47,319 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,SelfDestructingSolverStorable2 [2021-12-22 11:38:47,320 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:47,320 INFO L85 PathProgramCache]: Analyzing trace with hash -749766204, now seen corresponding path program 2 times [2021-12-22 11:38:47,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:47,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485971792] [2021-12-22 11:38:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:47,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:38:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:38:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 11:38:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-22 11:38:47,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485971792] [2021-12-22 11:38:47,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485971792] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:47,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236534631] [2021-12-22 11:38:47,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 11:38:47,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:47,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:47,627 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) [2021-12-22 11:38:47,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 11:38:47,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 11:38:47,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:38:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 11:38:47,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-22 11:38:47,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:38:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-22 11:38:49,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236534631] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:38:49,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:38:49,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 15] total 29 [2021-12-22 11:38:49,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76837325] [2021-12-22 11:38:49,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:38:49,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 11:38:49,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 11:38:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-12-22 11:38:49,022 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 23 states have internal predecessors, (62), 9 states have call successors, (13), 2 states have call predecessors, (13), 12 states have return successors, (24), 15 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-22 11:38:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:49,454 INFO L93 Difference]: Finished difference Result 119 states and 222 transitions. [2021-12-22 11:38:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 11:38:49,456 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 23 states have internal predecessors, (62), 9 states have call successors, (13), 2 states have call predecessors, (13), 12 states have return successors, (24), 15 states have call predecessors, (24), 9 states have call successors, (24) Word has length 79 [2021-12-22 11:38:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:49,458 INFO L225 Difference]: With dead ends: 119 [2021-12-22 11:38:49,458 INFO L226 Difference]: Without dead ends: 71 [2021-12-22 11:38:49,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2021-12-22 11:38:49,460 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:49,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 184 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:38:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-22 11:38:49,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2021-12-22 11:38:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (24), 11 states have call predecessors, (24), 8 states have call successors, (24) [2021-12-22 11:38:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2021-12-22 11:38:49,470 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 79 [2021-12-22 11:38:49,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:49,470 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2021-12-22 11:38:49,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 23 states have internal predecessors, (62), 9 states have call successors, (13), 2 states have call predecessors, (13), 12 states have return successors, (24), 15 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-22 11:38:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2021-12-22 11:38:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-22 11:38:49,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:49,472 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:49,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 11:38:49,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:49,677 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash -714127218, now seen corresponding path program 3 times [2021-12-22 11:38:49,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:49,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403697517] [2021-12-22 11:38:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:49,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:38:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:38:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:49,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:50,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:38:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:50,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:38:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:50,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 11:38:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:50,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:50,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:50,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 338 proven. 129 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-12-22 11:38:50,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:50,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403697517] [2021-12-22 11:38:50,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403697517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:50,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191510343] [2021-12-22 11:38:50,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 11:38:50,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:50,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:50,071 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) [2021-12-22 11:38:50,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 11:38:50,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-22 11:38:50,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:38:50,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 11:38:50,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 315 proven. 141 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-22 11:38:50,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:38:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 357 proven. 126 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-12-22 11:38:52,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191510343] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:38:52,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:38:52,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 25] total 41 [2021-12-22 11:38:52,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603320237] [2021-12-22 11:38:52,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:38:52,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-22 11:38:52,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:52,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-22 11:38:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2021-12-22 11:38:52,917 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 41 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 33 states have internal predecessors, (78), 14 states have call successors, (17), 1 states have call predecessors, (17), 18 states have return successors, (30), 20 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-22 11:38:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:53,749 INFO L93 Difference]: Finished difference Result 147 states and 279 transitions. [2021-12-22 11:38:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-22 11:38:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 33 states have internal predecessors, (78), 14 states have call successors, (17), 1 states have call predecessors, (17), 18 states have return successors, (30), 20 states have call predecessors, (30), 14 states have call successors, (30) Word has length 131 [2021-12-22 11:38:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:53,756 INFO L225 Difference]: With dead ends: 147 [2021-12-22 11:38:53,756 INFO L226 Difference]: Without dead ends: 92 [2021-12-22 11:38:53,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1123, Invalid=4883, Unknown=0, NotChecked=0, Total=6006 [2021-12-22 11:38:53,759 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:53,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 242 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:38:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-22 11:38:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2021-12-22 11:38:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (24), 11 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-22 11:38:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2021-12-22 11:38:53,769 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 131 [2021-12-22 11:38:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:53,770 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2021-12-22 11:38:53,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 33 states have internal predecessors, (78), 14 states have call successors, (17), 1 states have call predecessors, (17), 18 states have return successors, (30), 20 states have call predecessors, (30), 14 states have call successors, (30) [2021-12-22 11:38:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2021-12-22 11:38:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-22 11:38:53,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:53,772 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 16, 11, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:53,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 11:38:53,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:53,989 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:53,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1633021193, now seen corresponding path program 4 times [2021-12-22 11:38:53,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:53,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985943552] [2021-12-22 11:38:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:53,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:38:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:38:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:38:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 11:38:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:38:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:38:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 11:38:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 172 proven. 544 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2021-12-22 11:38:54,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:54,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985943552] [2021-12-22 11:38:54,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985943552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:54,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862574748] [2021-12-22 11:38:54,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 11:38:54,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:54,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:54,306 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) [2021-12-22 11:38:54,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 11:38:54,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 11:38:54,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:38:54,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 11:38:54,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 451 proven. 191 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2021-12-22 11:38:54,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:38:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 451 proven. 225 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2021-12-22 11:38:56,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862574748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:38:56,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:38:56,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 11] total 26 [2021-12-22 11:38:56,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249734070] [2021-12-22 11:38:56,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:38:56,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 11:38:56,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:38:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 11:38:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-12-22 11:38:56,071 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 23 states have internal predecessors, (76), 14 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (32), 16 states have call predecessors, (32), 14 states have call successors, (32) [2021-12-22 11:38:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:38:57,182 INFO L93 Difference]: Finished difference Result 195 states and 402 transitions. [2021-12-22 11:38:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-22 11:38:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 23 states have internal predecessors, (76), 14 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (32), 16 states have call predecessors, (32), 14 states have call successors, (32) Word has length 184 [2021-12-22 11:38:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:38:57,185 INFO L225 Difference]: With dead ends: 195 [2021-12-22 11:38:57,186 INFO L226 Difference]: Without dead ends: 70 [2021-12-22 11:38:57,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 412 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1268, Invalid=4894, Unknown=0, NotChecked=0, Total=6162 [2021-12-22 11:38:57,188 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 11:38:57,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 178 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 11:38:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-22 11:38:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-12-22 11:38:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (18), 13 states have call predecessors, (18), 10 states have call successors, (18) [2021-12-22 11:38:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-12-22 11:38:57,195 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 184 [2021-12-22 11:38:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:38:57,196 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-12-22 11:38:57,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 23 states have internal predecessors, (76), 14 states have call successors, (22), 1 states have call predecessors, (22), 13 states have return successors, (32), 16 states have call predecessors, (32), 14 states have call successors, (32) [2021-12-22 11:38:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-12-22 11:38:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-22 11:38:57,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:38:57,198 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:38:57,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 11:38:57,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:57,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:38:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:38:57,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 5 times [2021-12-22 11:38:57,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:38:57,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936863001] [2021-12-22 11:38:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:38:57,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:38:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:38:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:38:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:38:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:38:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 11:38:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:38:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:38:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:38:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:38:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:38:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2021-12-22 11:38:57,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:38:57,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936863001] [2021-12-22 11:38:57,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936863001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:38:57,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996128346] [2021-12-22 11:38:57,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 11:38:57,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:38:57,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:38:57,739 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) [2021-12-22 11:38:57,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 11:38:57,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-22 11:38:57,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:38:57,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 11:38:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:38:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-12-22 11:38:58,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-12-22 11:39:00,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996128346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:00,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:00,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 27] total 37 [2021-12-22 11:39:00,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195694822] [2021-12-22 11:39:00,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:00,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-22 11:39:00,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-22 11:39:00,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 11:39:00,757 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 31 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2021-12-22 11:39:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:01,361 INFO L93 Difference]: Finished difference Result 140 states and 181 transitions. [2021-12-22 11:39:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-22 11:39:01,362 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 31 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) Word has length 157 [2021-12-22 11:39:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:01,363 INFO L225 Difference]: With dead ends: 140 [2021-12-22 11:39:01,363 INFO L226 Difference]: Without dead ends: 83 [2021-12-22 11:39:01,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 343 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=847, Invalid=3709, Unknown=0, NotChecked=0, Total=4556 [2021-12-22 11:39:01,365 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:01,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 251 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 11:39:01,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-22 11:39:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2021-12-22 11:39:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 15 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-22 11:39:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-12-22 11:39:01,373 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 157 [2021-12-22 11:39:01,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:01,373 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-12-22 11:39:01,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 31 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2021-12-22 11:39:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-12-22 11:39:01,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-22 11:39:01,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:01,376 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:01,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:01,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:01,588 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 6 times [2021-12-22 11:39:01,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:01,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313518626] [2021-12-22 11:39:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:01,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:39:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:39:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 11:39:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 11:39:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2021-12-22 11:39:01,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:01,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313518626] [2021-12-22 11:39:01,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313518626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:01,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824658732] [2021-12-22 11:39:01,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 11:39:01,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:01,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:01,957 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) [2021-12-22 11:39:01,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 11:39:02,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-12-22 11:39:02,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-22 11:39:02,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2021-12-22 11:39:02,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-12-22 11:39:05,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824658732] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:05,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:05,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 28] total 34 [2021-12-22 11:39:05,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047988892] [2021-12-22 11:39:05,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:05,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 11:39:05,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 11:39:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 11:39:05,124 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 30 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-22 11:39:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:05,912 INFO L93 Difference]: Finished difference Result 158 states and 209 transitions. [2021-12-22 11:39:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-22 11:39:05,912 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 30 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) Word has length 170 [2021-12-22 11:39:05,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:05,932 INFO L225 Difference]: With dead ends: 158 [2021-12-22 11:39:05,932 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 11:39:05,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 376 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=955, Invalid=3875, Unknown=0, NotChecked=0, Total=4830 [2021-12-22 11:39:05,934 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 75 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:05,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 271 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 11:39:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 11:39:05,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 72. [2021-12-22 11:39:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.125) internal successors, (54), 49 states have internal predecessors, (54), 12 states have call successors, (12), 5 states have call predecessors, (12), 11 states have return successors, (26), 17 states have call predecessors, (26), 12 states have call successors, (26) [2021-12-22 11:39:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-12-22 11:39:05,948 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 170 [2021-12-22 11:39:05,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:05,949 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-12-22 11:39:05,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 30 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2021-12-22 11:39:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-12-22 11:39:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-22 11:39:05,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:05,951 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:05,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:06,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:06,155 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 7 times [2021-12-22 11:39:06,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:06,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645230982] [2021-12-22 11:39:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:06,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:39:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:39:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 11:39:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 11:39:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 11:39:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2021-12-22 11:39:06,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:06,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645230982] [2021-12-22 11:39:06,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645230982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:06,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067632142] [2021-12-22 11:39:06,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 11:39:06,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:06,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:06,719 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) [2021-12-22 11:39:06,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 11:39:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:06,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-22 11:39:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2021-12-22 11:39:07,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2021-12-22 11:39:08,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067632142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:08,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:08,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 36 [2021-12-22 11:39:08,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507337416] [2021-12-22 11:39:08,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:08,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 11:39:08,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:08,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 11:39:08,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 11:39:08,896 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-22 11:39:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:11,559 INFO L93 Difference]: Finished difference Result 146 states and 197 transitions. [2021-12-22 11:39:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-22 11:39:11,560 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 183 [2021-12-22 11:39:11,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:11,561 INFO L225 Difference]: With dead ends: 146 [2021-12-22 11:39:11,561 INFO L226 Difference]: Without dead ends: 130 [2021-12-22 11:39:11,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 404 SyntacticMatches, 9 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=880, Invalid=6260, Unknown=0, NotChecked=0, Total=7140 [2021-12-22 11:39:11,563 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 105 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:11,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 536 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 11:39:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-22 11:39:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2021-12-22 11:39:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 58 states have internal predecessors, (65), 15 states have call successors, (15), 6 states have call predecessors, (15), 13 states have return successors, (37), 21 states have call predecessors, (37), 15 states have call successors, (37) [2021-12-22 11:39:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2021-12-22 11:39:11,587 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 183 [2021-12-22 11:39:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:11,588 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2021-12-22 11:39:11,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2021-12-22 11:39:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2021-12-22 11:39:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-22 11:39:11,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:11,591 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:11,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 11:39:11,799 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,SelfDestructingSolverStorable8 [2021-12-22 11:39:11,799 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash 530318069, now seen corresponding path program 8 times [2021-12-22 11:39:11,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:11,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362726991] [2021-12-22 11:39:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:11,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:39:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:39:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:11,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 11:39:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 11:39:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 11:39:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 11:39:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 665 proven. 517 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2021-12-22 11:39:12,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:12,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362726991] [2021-12-22 11:39:12,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362726991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:12,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959332278] [2021-12-22 11:39:12,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 11:39:12,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:12,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:12,175 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) [2021-12-22 11:39:12,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 11:39:12,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 11:39:12,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-22 11:39:12,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2021-12-22 11:39:12,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2021-12-22 11:39:16,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959332278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:16,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:16,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 32] total 38 [2021-12-22 11:39:16,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393520091] [2021-12-22 11:39:16,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:16,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 11:39:16,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 11:39:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 11:39:16,231 INFO L87 Difference]: Start difference. First operand 86 states and 117 transitions. Second operand has 38 states, 38 states have (on average 2.5) internal successors, (95), 34 states have internal predecessors, (95), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) [2021-12-22 11:39:16,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:16,847 INFO L93 Difference]: Finished difference Result 208 states and 286 transitions. [2021-12-22 11:39:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-22 11:39:16,848 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 34 states have internal predecessors, (95), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) Word has length 196 [2021-12-22 11:39:16,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:16,849 INFO L225 Difference]: With dead ends: 208 [2021-12-22 11:39:16,849 INFO L226 Difference]: Without dead ends: 127 [2021-12-22 11:39:16,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 434 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=759, Invalid=3147, Unknown=0, NotChecked=0, Total=3906 [2021-12-22 11:39:16,851 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 131 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:16,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 344 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 11:39:16,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-22 11:39:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2021-12-22 11:39:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 61 states have internal predecessors, (67), 16 states have call successors, (16), 6 states have call predecessors, (16), 14 states have return successors, (39), 23 states have call predecessors, (39), 16 states have call successors, (39) [2021-12-22 11:39:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2021-12-22 11:39:16,865 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 196 [2021-12-22 11:39:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:16,865 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2021-12-22 11:39:16,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5) internal successors, (95), 34 states have internal predecessors, (95), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) [2021-12-22 11:39:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2021-12-22 11:39:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-22 11:39:16,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:16,867 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:16,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:17,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 11:39:17,079 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:17,080 INFO L85 PathProgramCache]: Analyzing trace with hash 660925528, now seen corresponding path program 9 times [2021-12-22 11:39:17,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:17,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538899287] [2021-12-22 11:39:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:17,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:39:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:39:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 11:39:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-22 11:39:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 11:39:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 11:39:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 11:39:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 268 proven. 783 refuted. 0 times theorem prover too weak. 1269 trivial. 0 not checked. [2021-12-22 11:39:17,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:17,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538899287] [2021-12-22 11:39:17,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538899287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:17,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040591082] [2021-12-22 11:39:17,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 11:39:17,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:17,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:17,367 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:39:17,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 11:39:17,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-22 11:39:17,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:17,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 11:39:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-12-22 11:39:17,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2021-12-22 11:39:19,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040591082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:19,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:19,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2021-12-22 11:39:19,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454952768] [2021-12-22 11:39:19,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:19,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 11:39:19,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 11:39:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-12-22 11:39:19,784 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 27 states, 27 states have (on average 3.0) internal successors, (81), 24 states have internal predecessors, (81), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2021-12-22 11:39:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:20,073 INFO L93 Difference]: Finished difference Result 183 states and 249 transitions. [2021-12-22 11:39:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 11:39:20,073 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 24 states have internal predecessors, (81), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 209 [2021-12-22 11:39:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:20,075 INFO L225 Difference]: With dead ends: 183 [2021-12-22 11:39:20,075 INFO L226 Difference]: Without dead ends: 97 [2021-12-22 11:39:20,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 468 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=401, Invalid=1491, Unknown=0, NotChecked=0, Total=1892 [2021-12-22 11:39:20,076 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:20,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 230 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:39:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-22 11:39:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2021-12-22 11:39:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 58 states have internal predecessors, (64), 15 states have call successors, (15), 6 states have call predecessors, (15), 13 states have return successors, (30), 21 states have call predecessors, (30), 15 states have call successors, (30) [2021-12-22 11:39:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2021-12-22 11:39:20,084 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 209 [2021-12-22 11:39:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:20,084 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2021-12-22 11:39:20,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.0) internal successors, (81), 24 states have internal predecessors, (81), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2021-12-22 11:39:20,084 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2021-12-22 11:39:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-22 11:39:20,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:39:20,093 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:39:20,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:20,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 11:39:20,311 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:39:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:39:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash 471385981, now seen corresponding path program 10 times [2021-12-22 11:39:20,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:39:20,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957240622] [2021-12-22 11:39:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:39:20,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:39:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:39:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:39:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 11:39:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 11:39:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 11:39:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-22 11:39:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:39:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 11:39:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:39:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 11:39:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 11:39:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 11:39:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 11:39:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:39:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 228 proven. 513 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2021-12-22 11:39:20,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:39:20,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957240622] [2021-12-22 11:39:20,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957240622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:39:20,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067946453] [2021-12-22 11:39:20,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 11:39:20,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:39:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:39:20,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:39:20,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 11:39:21,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 11:39:21,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:39:21,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 11:39:21,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:39:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2021-12-22 11:39:21,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:39:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 522 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2021-12-22 11:39:22,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067946453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:39:22,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:39:22,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2021-12-22 11:39:22,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435492692] [2021-12-22 11:39:22,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:39:22,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 11:39:22,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:39:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 11:39:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:39:22,188 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-22 11:39:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:39:22,266 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2021-12-22 11:39:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 11:39:22,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) Word has length 281 [2021-12-22 11:39:22,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:39:22,267 INFO L225 Difference]: With dead ends: 89 [2021-12-22 11:39:22,267 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 11:39:22,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 639 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-12-22 11:39:22,268 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:39:22,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 91 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:39:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 11:39:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 11:39:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-12-22 11:39:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 11:39:22,268 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 281 [2021-12-22 11:39:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:39:22,269 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 11:39:22,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-12-22 11:39:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 11:39:22,269 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 11:39:22,271 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 11:39:22,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 11:39:22,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 11:39:22,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-22 11:39:31,869 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-22 11:39:31,869 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-22 11:39:31,869 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-22 11:39:31,869 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-12-22 11:39:31,869 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-22 11:39:31,870 INFO L861 garLoopResultBuilder]: At program point L27(lines 27 47) the Hoare annotation is: true [2021-12-22 11:39:31,870 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2021-12-22 11:39:31,870 INFO L858 garLoopResultBuilder]: For program point L45(line 45) no Hoare annotation was computed. [2021-12-22 11:39:31,870 INFO L858 garLoopResultBuilder]: For program point L42(lines 42 46) no Hoare annotation was computed. [2021-12-22 11:39:31,870 INFO L861 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: true [2021-12-22 11:39:31,870 INFO L858 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2021-12-22 11:39:31,870 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 40) no Hoare annotation was computed. [2021-12-22 11:39:31,870 INFO L858 garLoopResultBuilder]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2021-12-22 11:39:31,870 INFO L854 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-12-22 11:39:31,870 INFO L858 garLoopResultBuilder]: For program point L23-1(line 23) no Hoare annotation was computed. [2021-12-22 11:39:31,870 INFO L861 garLoopResultBuilder]: At program point ackermannENTRY(lines 16 24) the Hoare annotation is: true [2021-12-22 11:39:31,871 INFO L854 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2021-12-22 11:39:31,871 INFO L854 garLoopResultBuilder]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse14 (= |ackermann_#in~m| 0)) (.cse3 (= ackermann_~n |ackermann_#in~n|)) (.cse5 (= ackermann_~m |ackermann_#in~m|))) (let ((.cse8 (<= 4 |ackermann_#t~ret5|)) (.cse9 (and .cse14 .cse3 .cse5)) (.cse2 (<= 3 |ackermann_#t~ret5|)) (.cse6 (<= ackermann_~m 1))) (and (let ((.cse7 (<= 3 |ackermann_#in~n|)) (.cse4 (<= 1 |ackermann_#in~m|)) (.cse0 (<= 5 |ackermann_#t~ret5|)) (.cse1 (<= |ackermann_#t~ret5| 5)) (.cse11 (<= 2 |ackermann_#in~n|)) (.cse10 (<= 2 |ackermann_#in~m|)) (.cse12 (<= |ackermann_#t~ret5| 3))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 4 |ackermann_#in~n|) .cse4 .cse5 (<= |ackermann_#in~n| 4) .cse6) (and (<= |ackermann_#in~n| 3) (<= |ackermann_#t~ret5| 4) .cse2 .cse3 .cse7 .cse4 .cse5 .cse6 .cse8) .cse9 (and .cse0 .cse10 .cse7) (<= 3 |ackermann_#in~m|) (and (<= |ackermann_#t~ret5| 2) .cse4) (and (<= |ackermann_#in~n| 2) .cse11 .cse4 .cse12) (and (<= 6 |ackermann_#t~ret5|) .cse0 .cse2 .cse3 (<= |ackermann_#t~ret5| 6) .cse4 .cse5 .cse6 (<= 5 |ackermann_#in~n|)) (and .cse0 .cse2 .cse3 .cse4 .cse5 .cse6 (<= 6 |ackermann_#in~n|)) (and .cse0 .cse1 .cse10 .cse11) (and .cse10 .cse12))) (let ((.cse13 (< |ackermann_#in~n| 2))) (or (and .cse3 .cse5 .cse8) .cse9 (and .cse2 .cse3 .cse13 .cse5) (and .cse3 .cse13 (<= 2 |ackermann_#t~ret5|) .cse5 .cse6) (and .cse2 .cse3 .cse5 .cse6))) (or .cse14 (not (<= |ackermann_#in~n| 0)))))) [2021-12-22 11:39:31,871 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 22) no Hoare annotation was computed. [2021-12-22 11:39:31,872 INFO L858 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-12-22 11:39:31,872 INFO L858 garLoopResultBuilder]: For program point L23-3(line 23) no Hoare annotation was computed. [2021-12-22 11:39:31,872 INFO L858 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2021-12-22 11:39:31,872 INFO L858 garLoopResultBuilder]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2021-12-22 11:39:31,874 INFO L732 BasicCegarLoop]: Path program histogram: [10, 1, 1] [2021-12-22 11:39:31,875 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 11:39:31,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 11:39:31 BoogieIcfgContainer [2021-12-22 11:39:31,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 11:39:31,881 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 11:39:31,881 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 11:39:31,881 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 11:39:31,881 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:38:45" (3/4) ... [2021-12-22 11:39:31,883 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 11:39:31,887 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2021-12-22 11:39:31,891 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-12-22 11:39:31,891 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-12-22 11:39:31,891 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-22 11:39:31,891 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 11:39:31,916 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 11:39:31,916 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 11:39:31,916 INFO L158 Benchmark]: Toolchain (without parser) took 47285.17ms. Allocated memory was 109.1MB in the beginning and 337.6MB in the end (delta: 228.6MB). Free memory was 77.8MB in the beginning and 229.8MB in the end (delta: -152.0MB). Peak memory consumption was 76.3MB. Max. memory is 16.1GB. [2021-12-22 11:39:31,917 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 81.8MB. Free memory was 52.5MB in the beginning and 52.4MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 11:39:31,917 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.20ms. Allocated memory is still 109.1MB. Free memory was 77.8MB in the beginning and 86.2MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 11:39:31,917 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.54ms. Allocated memory is still 109.1MB. Free memory was 86.2MB in the beginning and 84.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 11:39:31,918 INFO L158 Benchmark]: Boogie Preprocessor took 9.97ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 11:39:31,918 INFO L158 Benchmark]: RCFGBuilder took 257.09ms. Allocated memory is still 109.1MB. Free memory was 83.3MB in the beginning and 73.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 11:39:31,918 INFO L158 Benchmark]: TraceAbstraction took 46769.75ms. Allocated memory was 109.1MB in the beginning and 337.6MB in the end (delta: 228.6MB). Free memory was 73.6MB in the beginning and 232.9MB in the end (delta: -159.4MB). Peak memory consumption was 204.8MB. Max. memory is 16.1GB. [2021-12-22 11:39:31,918 INFO L158 Benchmark]: Witness Printer took 35.36ms. Allocated memory is still 337.6MB. Free memory was 231.9MB in the beginning and 229.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 11:39:31,921 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 81.8MB. Free memory was 52.5MB in the beginning and 52.4MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.20ms. Allocated memory is still 109.1MB. Free memory was 77.8MB in the beginning and 86.2MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.54ms. Allocated memory is still 109.1MB. Free memory was 86.2MB in the beginning and 84.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 9.97ms. Allocated memory is still 109.1MB. Free memory was 84.7MB in the beginning and 83.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 257.09ms. Allocated memory is still 109.1MB. Free memory was 83.3MB in the beginning and 73.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 46769.75ms. Allocated memory was 109.1MB in the beginning and 337.6MB in the end (delta: 228.6MB). Free memory was 73.6MB in the beginning and 232.9MB in the end (delta: -159.4MB). Peak memory consumption was 204.8MB. Max. memory is 16.1GB. * Witness Printer took 35.36ms. Allocated memory is still 337.6MB. Free memory was 231.9MB in the beginning and 229.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 46.7s, OverallIterations: 12, TraceHistogramMax: 42, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 9.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 728 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 675 mSDsluCounter, 2575 SdHoareTripleChecker+Invalid, 2.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2240 mSDsCounter, 2153 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7234 IncrementalHoareTripleChecker+Invalid, 9387 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2153 mSolverCounterUnsat, 335 mSDtfsCounter, 7234 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4265 GetRequests, 3668 SyntacticMatches, 36 SemanticMatches, 561 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8017 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=10, InterpolantAutomatonStates: 342, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 192 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 526 PreInvPairs, 1368 NumberOfFragments, 262 HoareAnnotationTreeSize, 526 FomulaSimplifications, 73852 FormulaSimplificationTreeSizeReduction, 7.8s HoareSimplificationTime, 6 FomulaSimplificationsInter, 592947 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 24.6s InterpolantComputationTime, 3320 NumberOfCodeBlocks, 3193 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 4940 ConstructedInterpolants, 0 QuantifiedInterpolants, 9952 SizeOfPredicates, 86 NumberOfNonLiveVariables, 4656 ConjunctsInSsa, 305 ConjunctsInUnsatCore, 34 InterpolantComputations, 1 PerfectInterpolantSequences, 39129/48132 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-22 11:39:31,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE