./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/bitvector/soft_float_5a.c.cil.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 f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:54:09,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:54:09,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:54:09,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:54:09,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:54:09,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:54:09,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:54:09,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:54:09,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:54:09,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:54:09,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:54:09,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:54:09,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:54:09,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:54:09,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:54:09,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:54:09,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:54:09,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:54:09,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:54:09,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:54:09,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:54:09,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:54:09,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:54:09,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:54:09,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:54:09,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:54:09,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:54:09,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:54:09,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:54:09,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:54:09,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:54:09,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:54:09,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:54:09,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:54:09,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:54:09,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:54:09,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:54:09,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:54:09,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:54:09,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:54:09,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:54:09,326 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:54:09,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:54:09,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:54:09,349 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:54:09,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:54:09,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:54:09,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:54:09,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:54:09,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:54:09,352 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:54:09,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:54:09,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:54:09,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:54:09,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:54:09,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:54:09,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:54:09,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:54:09,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:54:09,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:54:09,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:54:09,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:54:09,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:54:09,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:54:09,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:54:09,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:54:09,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:54:09,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:54:09,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:54:09,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:54:09,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:54:09,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:54:09,355 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:54:09,355 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:54:09,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:54:09,356 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 [2021-12-27 21:54:09,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:54:09,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:54:09,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:54:09,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:54:09,597 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:54:09,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2021-12-27 21:54:09,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35bccac84/c6d7e8f3e1054589a35bb632d578a94c/FLAGac0afd36e [2021-12-27 21:54:09,977 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:54:09,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2021-12-27 21:54:09,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35bccac84/c6d7e8f3e1054589a35bb632d578a94c/FLAGac0afd36e [2021-12-27 21:54:10,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35bccac84/c6d7e8f3e1054589a35bb632d578a94c [2021-12-27 21:54:10,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:54:10,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:54:10,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:54:10,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:54:10,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:54:10,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@251e350f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10, skipping insertion in model container [2021-12-27 21:54:10,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:54:10,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:54:10,539 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/bitvector/soft_float_5a.c.cil.c[728,741] [2021-12-27 21:54:10,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:54:10,569 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:54:10,580 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/bitvector/soft_float_5a.c.cil.c[728,741] [2021-12-27 21:54:10,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:54:10,631 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:54:10,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10 WrapperNode [2021-12-27 21:54:10,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:54:10,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:54:10,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:54:10,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:54:10,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,661 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2021-12-27 21:54:10,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:54:10,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:54:10,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:54:10,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:54:10,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:54:10,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:54:10,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:54:10,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:54:10,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (1/1) ... [2021-12-27 21:54:10,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:54:10,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:10,705 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) [2021-12-27 21:54:10,707 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 [2021-12-27 21:54:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:54:10,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:54:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-27 21:54:10,730 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-27 21:54:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:54:10,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:54:10,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-27 21:54:10,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-27 21:54:10,806 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:54:10,809 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:54:11,025 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:54:11,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:54:11,029 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-27 21:54:11,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:54:11 BoogieIcfgContainer [2021-12-27 21:54:11,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:54:11,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:54:11,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:54:11,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:54:11,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:54:10" (1/3) ... [2021-12-27 21:54:11,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2baca4f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:54:11, skipping insertion in model container [2021-12-27 21:54:11,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:54:10" (2/3) ... [2021-12-27 21:54:11,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2baca4f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:54:11, skipping insertion in model container [2021-12-27 21:54:11,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:54:11" (3/3) ... [2021-12-27 21:54:11,065 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2021-12-27 21:54:11,069 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:54:11,069 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:54:11,114 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:54:11,125 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 [2021-12-27 21:54:11,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:54:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:54:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-27 21:54:11,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:11,146 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:11,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1428146956, now seen corresponding path program 1 times [2021-12-27 21:54:11,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:11,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459818799] [2021-12-27 21:54:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:11,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-27 21:54:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 21:54:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:54:11,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:11,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459818799] [2021-12-27 21:54:11,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459818799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:54:11,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:54:11,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:54:11,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241339938] [2021-12-27 21:54:11,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:54:11,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:54:11,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:54:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:54:11,434 INFO L87 Difference]: Start difference. First operand has 52 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:11,483 INFO L93 Difference]: Finished difference Result 117 states and 178 transitions. [2021-12-27 21:54:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:54:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2021-12-27 21:54:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:11,493 INFO L225 Difference]: With dead ends: 117 [2021-12-27 21:54:11,494 INFO L226 Difference]: Without dead ends: 46 [2021-12-27 21:54:11,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:54:11,500 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:11,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 138 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:54:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-27 21:54:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-27 21:54:11,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 39 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-27 21:54:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2021-12-27 21:54:11,537 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 42 [2021-12-27 21:54:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:11,539 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2021-12-27 21:54:11,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2021-12-27 21:54:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-27 21:54:11,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:11,542 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:11,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:54:11,543 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:11,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1598687974, now seen corresponding path program 1 times [2021-12-27 21:54:11,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:11,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185986843] [2021-12-27 21:54:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:11,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-27 21:54:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 21:54:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:54:11,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185986843] [2021-12-27 21:54:11,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185986843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:54:11,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:54:11,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:54:11,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327176335] [2021-12-27 21:54:11,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:54:11,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:54:11,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:11,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:54:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:54:11,647 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:11,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:11,677 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-12-27 21:54:11,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:54:11,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-27 21:54:11,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:11,678 INFO L225 Difference]: With dead ends: 67 [2021-12-27 21:54:11,679 INFO L226 Difference]: Without dead ends: 46 [2021-12-27 21:54:11,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:54:11,680 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:11,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 184 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:54:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-27 21:54:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-27 21:54:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-27 21:54:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-12-27 21:54:11,688 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 44 [2021-12-27 21:54:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:11,689 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-12-27 21:54:11,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-12-27 21:54:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-27 21:54:11,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:11,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:11,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:54:11,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1011881960, now seen corresponding path program 1 times [2021-12-27 21:54:11,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877575408] [2021-12-27 21:54:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:11,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-27 21:54:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 21:54:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:11,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877575408] [2021-12-27 21:54:11,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877575408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405061218] [2021-12-27 21:54:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:11,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:11,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:11,789 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) [2021-12-27 21:54:11,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:54:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-27 21:54:11,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:54:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-27 21:54:12,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:54:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-27 21:54:12,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405061218] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:12,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:54:12,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2021-12-27 21:54:12,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461801996] [2021-12-27 21:54:12,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:54:12,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 21:54:12,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:12,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 21:54:12,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:54:12,238 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:12,303 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2021-12-27 21:54:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 21:54:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-27 21:54:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:12,306 INFO L225 Difference]: With dead ends: 74 [2021-12-27 21:54:12,306 INFO L226 Difference]: Without dead ends: 69 [2021-12-27 21:54:12,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-27 21:54:12,307 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 45 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:12,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 324 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:54:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-27 21:54:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-12-27 21:54:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 states have internal predecessors, (80), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-27 21:54:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2021-12-27 21:54:12,313 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 44 [2021-12-27 21:54:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:12,314 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2021-12-27 21:54:12,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2021-12-27 21:54:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-27 21:54:12,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:12,315 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:12,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:54:12,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:12,538 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:12,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:12,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1717525586, now seen corresponding path program 1 times [2021-12-27 21:54:12,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:12,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711190773] [2021-12-27 21:54:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:12,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:12,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:12,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:12,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-27 21:54:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:12,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 21:54:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:12,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711190773] [2021-12-27 21:54:12,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711190773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676643021] [2021-12-27 21:54:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:12,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:12,593 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) [2021-12-27 21:54:12,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:54:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 21:54:12,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:54:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:12,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:54:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:54:12,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676643021] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:12,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:54:12,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 7] total 12 [2021-12-27 21:54:12,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320997493] [2021-12-27 21:54:12,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:54:12,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:54:12,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:54:12,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:54:12,864 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:12,900 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2021-12-27 21:54:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:54:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-12-27 21:54:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:12,901 INFO L225 Difference]: With dead ends: 83 [2021-12-27 21:54:12,901 INFO L226 Difference]: Without dead ends: 77 [2021-12-27 21:54:12,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-27 21:54:12,902 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:12,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 229 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:54:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-27 21:54:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-27 21:54:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 67 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-27 21:54:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2021-12-27 21:54:12,908 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 46 [2021-12-27 21:54:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:12,909 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2021-12-27 21:54:12,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2021-12-27 21:54:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-27 21:54:12,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:12,910 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:12,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 21:54:13,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-27 21:54:13,124 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1660267284, now seen corresponding path program 1 times [2021-12-27 21:54:13,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:13,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245325503] [2021-12-27 21:54:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:13,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-27 21:54:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 21:54:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:54:13,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:13,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245325503] [2021-12-27 21:54:13,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245325503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:54:13,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:54:13,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-27 21:54:13,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607676861] [2021-12-27 21:54:13,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:54:13,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-27 21:54:13,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:13,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-27 21:54:13,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-27 21:54:13,185 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:13,211 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2021-12-27 21:54:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:54:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-12-27 21:54:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:13,214 INFO L225 Difference]: With dead ends: 81 [2021-12-27 21:54:13,214 INFO L226 Difference]: Without dead ends: 70 [2021-12-27 21:54:13,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:54:13,216 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:13,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 298 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:54:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-27 21:54:13,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-27 21:54:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-27 21:54:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2021-12-27 21:54:13,232 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 46 [2021-12-27 21:54:13,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:13,232 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2021-12-27 21:54:13,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2021-12-27 21:54:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-27 21:54:13,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:13,235 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:13,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 21:54:13,235 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash 918601705, now seen corresponding path program 1 times [2021-12-27 21:54:13,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:13,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278513859] [2021-12-27 21:54:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:13,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-27 21:54:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-27 21:54:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:13,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:13,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278513859] [2021-12-27 21:54:13,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278513859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:13,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647962918] [2021-12-27 21:54:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:13,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:13,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:13,287 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) [2021-12-27 21:54:13,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:54:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:13,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-27 21:54:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:54:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-27 21:54:13,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:54:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-27 21:54:13,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647962918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:54:13,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:54:13,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 8] total 18 [2021-12-27 21:54:13,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134493497] [2021-12-27 21:54:13,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:54:13,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-27 21:54:13,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-27 21:54:13,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-12-27 21:54:13,621 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 16 states have internal predecessors, (57), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:54:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:13,876 INFO L93 Difference]: Finished difference Result 191 states and 260 transitions. [2021-12-27 21:54:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-27 21:54:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 16 states have internal predecessors, (57), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 47 [2021-12-27 21:54:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:13,878 INFO L225 Difference]: With dead ends: 191 [2021-12-27 21:54:13,878 INFO L226 Difference]: Without dead ends: 116 [2021-12-27 21:54:13,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-12-27 21:54:13,879 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 73 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:13,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 649 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:54:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-27 21:54:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 88. [2021-12-27 21:54:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 77 states have internal predecessors, (97), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-27 21:54:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 116 transitions. [2021-12-27 21:54:13,887 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 116 transitions. Word has length 47 [2021-12-27 21:54:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:13,887 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 116 transitions. [2021-12-27 21:54:13,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 16 states have internal predecessors, (57), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:54:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 116 transitions. [2021-12-27 21:54:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-27 21:54:13,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:13,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:13,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:54:14,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:14,104 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1536324889, now seen corresponding path program 1 times [2021-12-27 21:54:14,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230145846] [2021-12-27 21:54:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:14,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:54:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-27 21:54:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:14,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:14,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230145846] [2021-12-27 21:54:14,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230145846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:14,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448991294] [2021-12-27 21:54:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:14,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:14,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:14,161 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) [2021-12-27 21:54:14,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:54:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 21:54:14,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:54:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-27 21:54:14,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:54:14,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448991294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:54:14,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:54:14,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-27 21:54:14,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984901528] [2021-12-27 21:54:14,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:54:14,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:54:14,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:14,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:54:14,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-27 21:54:14,270 INFO L87 Difference]: Start difference. First operand 88 states and 116 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:54:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:14,300 INFO L93 Difference]: Finished difference Result 174 states and 230 transitions. [2021-12-27 21:54:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:54:14,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2021-12-27 21:54:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:14,301 INFO L225 Difference]: With dead ends: 174 [2021-12-27 21:54:14,302 INFO L226 Difference]: Without dead ends: 93 [2021-12-27 21:54:14,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:54:14,303 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:14,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:54:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-27 21:54:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-27 21:54:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 82 states have internal predecessors, (102), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-27 21:54:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 123 transitions. [2021-12-27 21:54:14,309 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 123 transitions. Word has length 51 [2021-12-27 21:54:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:14,310 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 123 transitions. [2021-12-27 21:54:14,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:54:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 123 transitions. [2021-12-27 21:54:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-27 21:54:14,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:14,311 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:14,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 21:54:14,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:14,526 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash -455620870, now seen corresponding path program 1 times [2021-12-27 21:54:14,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:14,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468618102] [2021-12-27 21:54:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:14,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-27 21:54:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-27 21:54:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:14,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468618102] [2021-12-27 21:54:14,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468618102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129660197] [2021-12-27 21:54:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:14,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:14,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:14,595 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) [2021-12-27 21:54:14,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:54:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-27 21:54:14,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:54:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-27 21:54:14,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:54:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-27 21:54:14,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129660197] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:54:14,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:54:14,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 14 [2021-12-27 21:54:14,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201820462] [2021-12-27 21:54:14,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:54:14,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-27 21:54:14,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-27 21:54:14,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-27 21:54:14,900 INFO L87 Difference]: Start difference. First operand 93 states and 123 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 12 states have internal predecessors, (76), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-27 21:54:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:15,164 INFO L93 Difference]: Finished difference Result 199 states and 268 transitions. [2021-12-27 21:54:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-27 21:54:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 12 states have internal predecessors, (76), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 53 [2021-12-27 21:54:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:15,166 INFO L225 Difference]: With dead ends: 199 [2021-12-27 21:54:15,166 INFO L226 Difference]: Without dead ends: 99 [2021-12-27 21:54:15,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-12-27 21:54:15,167 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:15,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 332 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:54:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-27 21:54:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2021-12-27 21:54:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 57 states have internal predecessors, (68), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:54:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2021-12-27 21:54:15,177 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 53 [2021-12-27 21:54:15,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:15,177 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2021-12-27 21:54:15,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 12 states have internal predecessors, (76), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-27 21:54:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2021-12-27 21:54:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-27 21:54:15,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:15,178 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:15,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:54:15,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:15,379 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:15,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2048926668, now seen corresponding path program 1 times [2021-12-27 21:54:15,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:15,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136154993] [2021-12-27 21:54:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:15,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:15,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:15,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:15,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-27 21:54:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:15,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:54:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:15,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136154993] [2021-12-27 21:54:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136154993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:15,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420492141] [2021-12-27 21:54:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:15,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:15,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:15,422 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) [2021-12-27 21:54:15,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:54:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:15,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:54:15,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:54:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-27 21:54:15,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:54:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:15,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420492141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:54:15,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:54:15,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-12-27 21:54:15,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484712914] [2021-12-27 21:54:15,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:54:15,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-27 21:54:15,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:15,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-27 21:54:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-27 21:54:15,677 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-27 21:54:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:15,756 INFO L93 Difference]: Finished difference Result 159 states and 206 transitions. [2021-12-27 21:54:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-27 21:54:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 57 [2021-12-27 21:54:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:15,757 INFO L225 Difference]: With dead ends: 159 [2021-12-27 21:54:15,757 INFO L226 Difference]: Without dead ends: 102 [2021-12-27 21:54:15,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:54:15,758 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 89 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:15,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 259 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:54:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-27 21:54:15,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-12-27 21:54:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 65 states have internal predecessors, (81), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:54:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2021-12-27 21:54:15,766 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 57 [2021-12-27 21:54:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:15,766 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2021-12-27 21:54:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-27 21:54:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2021-12-27 21:54:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-27 21:54:15,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:15,767 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:15,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 21:54:15,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:15,979 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:15,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1999968309, now seen corresponding path program 1 times [2021-12-27 21:54:15,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:15,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372946845] [2021-12-27 21:54:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:15,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-27 21:54:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-27 21:54:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:16,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372946845] [2021-12-27 21:54:16,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372946845] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390760951] [2021-12-27 21:54:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:16,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:16,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:16,067 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) [2021-12-27 21:54:16,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:54:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-27 21:54:16,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:54:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-27 21:54:16,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:54:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-27 21:54:16,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390760951] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:16,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:54:16,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 9] total 19 [2021-12-27 21:54:16,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506920979] [2021-12-27 21:54:16,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:54:16,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 21:54:16,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:16,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 21:54:16,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:54:16,448 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:16,550 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2021-12-27 21:54:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 21:54:16,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-12-27 21:54:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:16,551 INFO L225 Difference]: With dead ends: 112 [2021-12-27 21:54:16,551 INFO L226 Difference]: Without dead ends: 94 [2021-12-27 21:54:16,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-12-27 21:54:16,552 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 56 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:16,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 305 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:54:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-27 21:54:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2021-12-27 21:54:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-27 21:54:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2021-12-27 21:54:16,558 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 59 [2021-12-27 21:54:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:16,558 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2021-12-27 21:54:16,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2021-12-27 21:54:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-27 21:54:16,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:16,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:16,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:54:16,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:16,775 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:16,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1708192973, now seen corresponding path program 1 times [2021-12-27 21:54:16,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:16,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440176559] [2021-12-27 21:54:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:16,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-27 21:54:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-27 21:54:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-27 21:54:16,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440176559] [2021-12-27 21:54:16,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440176559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705563053] [2021-12-27 21:54:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:16,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:16,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:16,843 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) [2021-12-27 21:54:16,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:54:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-27 21:54:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:54:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-27 21:54:16,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:54:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-27 21:54:17,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705563053] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:17,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:54:17,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 9] total 18 [2021-12-27 21:54:17,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431785955] [2021-12-27 21:54:17,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:54:17,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 21:54:17,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 21:54:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-27 21:54:17,142 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:17,201 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2021-12-27 21:54:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 21:54:17,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-12-27 21:54:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:17,202 INFO L225 Difference]: With dead ends: 98 [2021-12-27 21:54:17,203 INFO L226 Difference]: Without dead ends: 71 [2021-12-27 21:54:17,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-12-27 21:54:17,203 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 4 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:17,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 316 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:54:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-27 21:54:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-27 21:54:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-27 21:54:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-12-27 21:54:17,208 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 59 [2021-12-27 21:54:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:17,208 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-12-27 21:54:17,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:54:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-12-27 21:54:17,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-27 21:54:17,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:54:17,209 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:17,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-27 21:54:17,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-27 21:54:17,409 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:54:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:54:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash -221361354, now seen corresponding path program 2 times [2021-12-27 21:54:17,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:54:17,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645973359] [2021-12-27 21:54:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:54:17,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:54:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:17,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:54:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:17,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-27 21:54:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:17,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-27 21:54:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:17,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-27 21:54:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:54:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-27 21:54:17,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:54:17,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645973359] [2021-12-27 21:54:17,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645973359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:54:17,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862327624] [2021-12-27 21:54:17,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:54:17,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:17,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:54:17,489 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) [2021-12-27 21:54:17,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:54:17,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:54:17,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:54:17,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-27 21:54:17,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:54:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-27 21:54:17,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:54:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-27 21:54:17,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862327624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:54:17,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:54:17,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 17 [2021-12-27 21:54:17,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328964268] [2021-12-27 21:54:17,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:54:17,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 21:54:17,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:54:17,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 21:54:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-12-27 21:54:17,914 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 15 states have internal predecessors, (70), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-27 21:54:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:54:18,227 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2021-12-27 21:54:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-27 21:54:18,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 15 states have internal predecessors, (70), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 63 [2021-12-27 21:54:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:54:18,228 INFO L225 Difference]: With dead ends: 127 [2021-12-27 21:54:18,228 INFO L226 Difference]: Without dead ends: 0 [2021-12-27 21:54:18,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-12-27 21:54:18,229 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 122 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:54:18,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 147 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:54:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-27 21:54:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-27 21:54:18,230 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) [2021-12-27 21:54:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-27 21:54:18,230 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2021-12-27 21:54:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:54:18,230 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-27 21:54:18,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 15 states have internal predecessors, (70), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-27 21:54:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-27 21:54:18,231 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-27 21:54:18,232 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-27 21:54:18,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:54:18,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:54:18,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-27 21:54:19,283 INFO L854 garLoopResultBuilder]: At program point L73(lines 35 75) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2021-12-27 21:54:19,283 INFO L854 garLoopResultBuilder]: At program point L57-2(lines 57 72) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (not (= |base2flt_#in~m| 1))) [2021-12-27 21:54:19,283 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 34) no Hoare annotation was computed. [2021-12-27 21:54:19,283 INFO L858 garLoopResultBuilder]: For program point L58(lines 57 72) no Hoare annotation was computed. [2021-12-27 21:54:19,283 INFO L861 garLoopResultBuilder]: At program point base2fltENTRY(lines 24 82) the Hoare annotation is: true [2021-12-27 21:54:19,283 INFO L854 garLoopResultBuilder]: At program point L79(lines 28 81) the Hoare annotation is: (or (and (= base2flt_~m |base2flt_#in~m|) (<= |base2flt_#in~e| base2flt_~e) (or (= base2flt_~e |base2flt_#in~e|) (= base2flt_~e 0)) (= base2flt_~__retres4~0 0)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2021-12-27 21:54:19,283 INFO L858 garLoopResultBuilder]: For program point L38(lines 37 52) no Hoare annotation was computed. [2021-12-27 21:54:19,283 INFO L858 garLoopResultBuilder]: For program point base2fltFINAL(lines 24 82) no Hoare annotation was computed. [2021-12-27 21:54:19,283 INFO L858 garLoopResultBuilder]: For program point L59(lines 57 72) no Hoare annotation was computed. [2021-12-27 21:54:19,283 INFO L858 garLoopResultBuilder]: For program point base2fltEXIT(lines 24 82) no Hoare annotation was computed. [2021-12-27 21:54:19,283 INFO L858 garLoopResultBuilder]: For program point L47(lines 47 51) no Hoare annotation was computed. [2021-12-27 21:54:19,283 INFO L854 garLoopResultBuilder]: At program point L47-1(lines 37 52) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 75) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L854 garLoopResultBuilder]: At program point L217(lines 147 219) the Hoare annotation is: (let ((.cse0 (<= (mod |ULTIMATE.start_mulflt_#res#1| 4294967296) 0)) (.cse1 (<= (mod |ULTIMATE.start_mulflt_~__retres10~1#1| 4294967296) 0))) (or (and .cse0 .cse1 (<= 0 (div (* (- 1) (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) 4294967296)) (not (< 0 (mod |ULTIMATE.start_main_~zero~0#1| 4294967296)))) (and (= |ULTIMATE.start_main_~zero~0#1| 0) .cse0 .cse1) (and (= |ULTIMATE.start_main_~sb~0#1| 1) (= |ULTIMATE.start_main_~tmp~2#1| 1)) (<= (+ |ULTIMATE.start_main_~sb~0#1| 1) 0))) [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L246(lines 246 250) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L246-2(lines 246 250) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L861 garLoopResultBuilder]: At program point L238(line 238) the Hoare annotation is: true [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L238-1(line 238) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L185(lines 185 190) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L243(lines 243 252) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L243-2(lines 243 252) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L854 garLoopResultBuilder]: At program point L239(line 239) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L239-1(line 239) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L260(lines 260 264) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L194(lines 194 211) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L260-2(lines 260 264) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-27 21:54:19,284 INFO L858 garLoopResultBuilder]: For program point L194-2(lines 194 211) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L256(lines 256 272) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L256-1(lines 256 272) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L854 garLoopResultBuilder]: At program point L240(line 240) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L240-1(line 240) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L203(lines 203 208) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L195(lines 195 200) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L257(lines 257 266) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L854 garLoopResultBuilder]: At program point L257-2(lines 257 266) the Hoare annotation is: (and (= 0 |ULTIMATE.start_main_~tmp___1~0#1|) (= 0 |ULTIMATE.start_main_~tmp___0~0#1|)) [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L158(lines 158 164) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L158-2(lines 157 218) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L854 garLoopResultBuilder]: At program point L216(lines 157 218) the Hoare annotation is: (let ((.cse0 (<= (mod |ULTIMATE.start_mulflt_~__retres10~1#1| 4294967296) 0))) (or (and (= |ULTIMATE.start_main_~zero~0#1| 0) .cse0) (and .cse0 (<= 0 (div (* (- 1) (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) 4294967296)) (not (< 0 (mod |ULTIMATE.start_main_~zero~0#1| 4294967296)))) (and (= |ULTIMATE.start_main_~sb~0#1| 1) (= |ULTIMATE.start_main_~tmp~2#1| 1)) (<= (+ |ULTIMATE.start_main_~sb~0#1| 1) 0))) [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L179(lines 179 184) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L861 garLoopResultBuilder]: At program point L274(lines 220 276) the Hoare annotation is: true [2021-12-27 21:54:19,285 INFO L854 garLoopResultBuilder]: At program point L241(line 241) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L241-1(line 241) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2021-12-27 21:54:19,285 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 15 20) the Hoare annotation is: true [2021-12-27 21:54:19,285 INFO L858 garLoopResultBuilder]: For program point L16-2(lines 15 20) no Hoare annotation was computed. [2021-12-27 21:54:19,286 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 20) no Hoare annotation was computed. [2021-12-27 21:54:19,286 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-12-27 21:54:19,288 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:54:19,289 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-27 21:54:19,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 09:54:19 BoogieIcfgContainer [2021-12-27 21:54:19,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-27 21:54:19,300 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-27 21:54:19,300 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-27 21:54:19,300 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-27 21:54:19,300 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:54:11" (3/4) ... [2021-12-27 21:54:19,302 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-27 21:54:19,305 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2021-12-27 21:54:19,306 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-27 21:54:19,309 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-12-27 21:54:19,309 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-12-27 21:54:19,309 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-27 21:54:19,309 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-27 21:54:19,322 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((m == \old(m) && \old(e) <= e) && (e == \old(e) || e == 0)) && __retres4 == 0) || !(\old(m) % 4294967296 <= 0) [2021-12-27 21:54:19,322 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: !(\old(m) % 4294967296 <= 0) [2021-12-27 21:54:19,322 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\old(e) <= e && !(\old(m) % 4294967296 <= 0)) && !(\old(m) == 1) [2021-12-27 21:54:19,323 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: !(\old(m) % 4294967296 <= 0) [2021-12-27 21:54:19,323 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((\result % 4294967296 <= 0 && __retres10 % 4294967296 <= 0) && 0 <= -1 * (b % 4294967296) / 4294967296) && !(0 < zero % 4294967296)) || ((zero == 0 && \result % 4294967296 <= 0) && __retres10 % 4294967296 <= 0)) || (sb == 1 && tmp == 1)) || sb + 1 <= 0 [2021-12-27 21:54:19,333 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-27 21:54:19,333 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-27 21:54:19,334 INFO L158 Benchmark]: Toolchain (without parser) took 8925.80ms. Allocated memory was 52.4MB in the beginning and 96.5MB in the end (delta: 44.0MB). Free memory was 29.9MB in the beginning and 52.8MB in the end (delta: -22.9MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2021-12-27 21:54:19,334 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 52.4MB. Free memory was 35.1MB in the beginning and 35.1MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 21:54:19,334 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.86ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 29.7MB in the beginning and 47.1MB in the end (delta: -17.4MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2021-12-27 21:54:19,334 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.95ms. Allocated memory is still 65.0MB. Free memory was 46.9MB in the beginning and 45.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 21:54:19,335 INFO L158 Benchmark]: Boogie Preprocessor took 17.93ms. Allocated memory is still 65.0MB. Free memory was 45.1MB in the beginning and 44.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 21:54:19,335 INFO L158 Benchmark]: RCFGBuilder took 350.17ms. Allocated memory is still 65.0MB. Free memory was 43.8MB in the beginning and 30.6MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-27 21:54:19,335 INFO L158 Benchmark]: TraceAbstraction took 8267.48ms. Allocated memory was 65.0MB in the beginning and 96.5MB in the end (delta: 31.5MB). Free memory was 30.2MB in the beginning and 57.0MB in the end (delta: -26.8MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. [2021-12-27 21:54:19,335 INFO L158 Benchmark]: Witness Printer took 33.62ms. Allocated memory is still 96.5MB. Free memory was 57.0MB in the beginning and 52.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-27 21:54:19,336 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 52.4MB. Free memory was 35.1MB in the beginning and 35.1MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.86ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 29.7MB in the beginning and 47.1MB in the end (delta: -17.4MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.95ms. Allocated memory is still 65.0MB. Free memory was 46.9MB in the beginning and 45.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.93ms. Allocated memory is still 65.0MB. Free memory was 45.1MB in the beginning and 44.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 350.17ms. Allocated memory is still 65.0MB. Free memory was 43.8MB in the beginning and 30.6MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 8267.48ms. Allocated memory was 65.0MB in the beginning and 96.5MB in the end (delta: 31.5MB). Free memory was 30.2MB in the beginning and 57.0MB in the end (delta: -26.8MB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. * Witness Printer took 33.62ms. Allocated memory is still 96.5MB. Free memory was 57.0MB in the beginning and 52.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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: 17]: 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 3 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.2s, OverallIterations: 12, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 569 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 569 mSDsluCounter, 3332 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2700 mSDsCounter, 96 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1073 IncrementalHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 96 mSolverCounterUnsat, 632 mSDtfsCounter, 1073 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1103 GetRequests, 929 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=7, InterpolantAutomatonStates: 115, 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, 108 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 125 PreInvPairs, 291 NumberOfFragments, 166 HoareAnnotationTreeSize, 125 FomulaSimplifications, 3901 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 14 FomulaSimplificationsInter, 9087 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 1090 NumberOfCodeBlocks, 1090 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1489 ConstructedInterpolants, 0 QuantifiedInterpolants, 2980 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1510 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 29 InterpolantComputations, 8 PerfectInterpolantSequences, 734/950 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: 35]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 220]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 157]: Loop Invariant Derived loop invariant: (((zero == 0 && __retres10 % 4294967296 <= 0) || ((__retres10 % 4294967296 <= 0 && 0 <= -1 * (b % 4294967296) / 4294967296) && !(0 < zero % 4294967296))) || (sb == 1 && tmp == 1)) || sb + 1 <= 0 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: (((((\result % 4294967296 <= 0 && __retres10 % 4294967296 <= 0) && 0 <= -1 * (b % 4294967296) / 4294967296) && !(0 < zero % 4294967296)) || ((zero == 0 && \result % 4294967296 <= 0) && __retres10 % 4294967296 <= 0)) || (sb == 1 && tmp == 1)) || sb + 1 <= 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((m == \old(m) && \old(e) <= e) && (e == \old(e) || e == 0)) && __retres4 == 0) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (\old(e) <= e && !(\old(m) % 4294967296 <= 0)) && !(\old(m) == 1) RESULT: Ultimate proved your program to be correct! [2021-12-27 21:54:19,365 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