./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/nla-digbench-scaling/dijkstra-u_valuebound50.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 7ab48dd793c80bfdca8b2cb012b1dd7cd8eda625223788e3f60486b3a2e166d4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:15:57,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:15:57,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:15:57,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:15:57,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:15:57,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:15:57,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:15:57,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:15:57,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:15:57,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:15:58,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:15:58,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:15:58,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:15:58,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:15:58,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:15:58,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:15:58,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:15:58,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:15:58,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:15:58,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:15:58,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:15:58,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:15:58,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:15:58,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:15:58,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:15:58,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:15:58,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:15:58,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:15:58,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:15:58,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:15:58,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:15:58,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:15:58,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:15:58,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:15:58,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:15:58,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:15:58,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:15:58,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:15:58,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:15:58,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:15:58,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:15:58,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:15:58,071 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:15:58,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:15:58,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:15:58,075 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:15:58,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:15:58,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:15:58,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:15:58,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:15:58,078 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:15:58,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:15:58,079 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:15:58,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:15:58,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:15:58,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:15:58,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:15:58,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:15:58,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:15:58,080 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:15:58,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:15:58,081 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:15:58,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:15:58,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:15:58,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:15:58,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:15:58,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:15:58,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:15:58,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:15:58,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:15:58,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:15:58,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:15:58,084 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:15:58,084 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:15:58,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:15:58,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:15:58,085 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ab48dd793c80bfdca8b2cb012b1dd7cd8eda625223788e3f60486b3a2e166d4 [2021-12-16 00:15:58,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:15:58,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:15:58,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:15:58,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:15:58,323 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:15:58,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound50.c [2021-12-16 00:15:58,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76f12c726/3a0ffe7af86e487883a3dfb681babf4e/FLAG29aed86f7 [2021-12-16 00:15:58,740 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:15:58,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound50.c [2021-12-16 00:15:58,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76f12c726/3a0ffe7af86e487883a3dfb681babf4e/FLAG29aed86f7 [2021-12-16 00:15:59,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76f12c726/3a0ffe7af86e487883a3dfb681babf4e [2021-12-16 00:15:59,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:15:59,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:15:59,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:15:59,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:15:59,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:15:59,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a427f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59, skipping insertion in model container [2021-12-16 00:15:59,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:15:59,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:15:59,336 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/nla-digbench-scaling/dijkstra-u_valuebound50.c[525,538] [2021-12-16 00:15:59,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:15:59,388 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:15:59,400 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/nla-digbench-scaling/dijkstra-u_valuebound50.c[525,538] [2021-12-16 00:15:59,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:15:59,442 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:15:59,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59 WrapperNode [2021-12-16 00:15:59,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:15:59,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:15:59,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:15:59,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:15:59,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,486 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2021-12-16 00:15:59,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:15:59,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:15:59,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:15:59,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:15:59,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:15:59,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:15:59,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:15:59,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:15:59,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (1/1) ... [2021-12-16 00:15:59,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:15:59,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:15:59,544 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) [2021-12-16 00:15:59,549 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 [2021-12-16 00:15:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:15:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 00:15:59,572 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 00:15:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:15:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:15:59,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:15:59,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 00:15:59,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 00:15:59,616 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:15:59,617 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:15:59,731 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:15:59,736 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:15:59,737 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 00:15:59,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:15:59 BoogieIcfgContainer [2021-12-16 00:15:59,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:15:59,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:15:59,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:15:59,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:15:59,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:15:59" (1/3) ... [2021-12-16 00:15:59,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555948f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:15:59, skipping insertion in model container [2021-12-16 00:15:59,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:59" (2/3) ... [2021-12-16 00:15:59,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555948f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:15:59, skipping insertion in model container [2021-12-16 00:15:59,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:15:59" (3/3) ... [2021-12-16 00:15:59,745 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound50.c [2021-12-16 00:15:59,750 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:15:59,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:15:59,786 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:15:59,792 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 [2021-12-16 00:15:59,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:15:59,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 00:15:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 00:15:59,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:15:59,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:15:59,810 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:15:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:15:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash -645822239, now seen corresponding path program 1 times [2021-12-16 00:15:59,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:15:59,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034040437] [2021-12-16 00:15:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:15:59,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:15:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:59,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:15:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:59,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:15:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:16:00,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:16:00,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034040437] [2021-12-16 00:16:00,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034040437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:16:00,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:16:00,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 00:16:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605137656] [2021-12-16 00:16:00,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:16:00,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:16:00,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:16:00,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:16:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:16:00,039 INFO L87 Difference]: Start difference. First operand has 33 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 00:16:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:16:00,057 INFO L93 Difference]: Finished difference Result 63 states and 107 transitions. [2021-12-16 00:16:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:16:00,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-16 00:16:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:16:00,066 INFO L225 Difference]: With dead ends: 63 [2021-12-16 00:16:00,066 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 00:16:00,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:16:00,072 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:16:00,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:16:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 00:16:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-16 00:16:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 00:16:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-12-16 00:16:00,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 19 [2021-12-16 00:16:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:16:00,113 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-12-16 00:16:00,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 00:16:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-12-16 00:16:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 00:16:00,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:16:00,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:16:00,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 00:16:00,116 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:16:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:16:00,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1757085840, now seen corresponding path program 1 times [2021-12-16 00:16:00,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:16:00,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443321421] [2021-12-16 00:16:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:00,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:16:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:00,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:16:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:00,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:16:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:16:00,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:16:00,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443321421] [2021-12-16 00:16:00,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443321421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:16:00,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:16:00,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 00:16:00,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912258340] [2021-12-16 00:16:00,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:16:00,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 00:16:00,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:16:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 00:16:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:16:00,353 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 00:16:02,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:16:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:16:02,599 INFO L93 Difference]: Finished difference Result 64 states and 94 transitions. [2021-12-16 00:16:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:16:02,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-12-16 00:16:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:16:02,601 INFO L225 Difference]: With dead ends: 64 [2021-12-16 00:16:02,601 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 00:16:02,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:16:02,603 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:16:02,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 188 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-16 00:16:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 00:16:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-12-16 00:16:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 00:16:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2021-12-16 00:16:02,621 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 20 [2021-12-16 00:16:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:16:02,622 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2021-12-16 00:16:02,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 00:16:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2021-12-16 00:16:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 00:16:02,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:16:02,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:16:02,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 00:16:02,625 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:16:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:16:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash -332038773, now seen corresponding path program 1 times [2021-12-16 00:16:02,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:16:02,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705417492] [2021-12-16 00:16:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:02,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:16:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:02,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:16:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:02,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:16:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:16:02,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:16:02,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705417492] [2021-12-16 00:16:02,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705417492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:16:02,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878895238] [2021-12-16 00:16:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:02,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:02,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:16:02,916 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) [2021-12-16 00:16:02,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:16:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:02,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 00:16:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:16:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:16:03,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:16:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:16:03,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878895238] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:16:03,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:16:03,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-16 00:16:03,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311085540] [2021-12-16 00:16:03,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:16:03,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 00:16:03,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:16:03,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 00:16:03,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:16:03,328 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 00:16:06,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-16 00:16:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:16:07,181 INFO L93 Difference]: Finished difference Result 80 states and 117 transitions. [2021-12-16 00:16:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 00:16:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-16 00:16:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:16:07,183 INFO L225 Difference]: With dead ends: 80 [2021-12-16 00:16:07,183 INFO L226 Difference]: Without dead ends: 69 [2021-12-16 00:16:07,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-12-16 00:16:07,185 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 30 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 119 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-16 00:16:07,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 336 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-12-16 00:16:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-16 00:16:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-12-16 00:16:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 30 states have (on average 1.2) internal successors, (36), 33 states have internal predecessors, (36), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-16 00:16:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2021-12-16 00:16:07,201 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 22 [2021-12-16 00:16:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:16:07,202 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2021-12-16 00:16:07,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 00:16:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2021-12-16 00:16:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 00:16:07,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:16:07,205 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:16:07,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 00:16:07,419 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 [2021-12-16 00:16:07,420 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:16:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:16:07,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1041809680, now seen corresponding path program 1 times [2021-12-16 00:16:07,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:16:07,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246374191] [2021-12-16 00:16:07,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:07,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:16:07,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:16:07,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749496525] [2021-12-16 00:16:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:07,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:07,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:16:07,440 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) [2021-12-16 00:16:07,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:16:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:16:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:16:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:16:07,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:16:07,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:16:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246374191] [2021-12-16 00:16:07,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:16:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749496525] [2021-12-16 00:16:07,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749496525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:16:07,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:16:07,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:16:07,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410312768] [2021-12-16 00:16:07,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:16:07,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:16:07,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:16:07,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:16:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:16:07,647 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 00:16:09,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:16:11,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:16:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:16:12,055 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-12-16 00:16:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:16:12,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-12-16 00:16:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:16:12,059 INFO L225 Difference]: With dead ends: 70 [2021-12-16 00:16:12,059 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 00:16:12,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:16:12,060 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-16 00:16:12,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 147 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-12-16 00:16:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 00:16:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-16 00:16:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-16 00:16:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2021-12-16 00:16:12,068 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 30 [2021-12-16 00:16:12,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:16:12,069 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2021-12-16 00:16:12,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 00:16:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2021-12-16 00:16:12,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 00:16:12,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:16:12,070 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:16:12,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 00:16:12,275 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 [2021-12-16 00:16:12,275 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:16:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:16:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1015454531, now seen corresponding path program 1 times [2021-12-16 00:16:12,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:16:12,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124848530] [2021-12-16 00:16:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:12,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:16:12,287 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:16:12,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857939939] [2021-12-16 00:16:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:12,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:12,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:16:12,292 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) [2021-12-16 00:16:12,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:16:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:12,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:16:12,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:16:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:16:12,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:16:12,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:16:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124848530] [2021-12-16 00:16:12,449 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:16:12,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857939939] [2021-12-16 00:16:12,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857939939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:16:12,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:16:12,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:16:12,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943956440] [2021-12-16 00:16:12,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:16:12,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:16:12,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:16:12,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:16:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:16:12,452 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 00:16:14,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-16 00:16:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:16:15,748 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-12-16 00:16:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:16:15,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-12-16 00:16:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:16:15,749 INFO L225 Difference]: With dead ends: 69 [2021-12-16 00:16:15,750 INFO L226 Difference]: Without dead ends: 65 [2021-12-16 00:16:15,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:16:15,751 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-16 00:16:15,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 135 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-12-16 00:16:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-16 00:16:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-16 00:16:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-16 00:16:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-12-16 00:16:15,761 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 29 [2021-12-16 00:16:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:16:15,762 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-12-16 00:16:15,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 00:16:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-12-16 00:16:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 00:16:15,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:16:15,763 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:16:15,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 00:16:15,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:15,971 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:16:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:16:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1797429611, now seen corresponding path program 1 times [2021-12-16 00:16:15,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:16:15,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484074818] [2021-12-16 00:16:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:15,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:16:15,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:16:15,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389218154] [2021-12-16 00:16:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:15,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:15,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:16:15,989 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) [2021-12-16 00:16:15,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:16:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:16,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:16:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:16:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:16:16,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:16:16,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:16:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484074818] [2021-12-16 00:16:16,149 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:16:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389218154] [2021-12-16 00:16:16,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389218154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:16:16,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:16:16,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:16:16,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592165539] [2021-12-16 00:16:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:16:16,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:16:16,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:16:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:16:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:16:16,151 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 00:16:18,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:16:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:16:18,981 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2021-12-16 00:16:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:16:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-12-16 00:16:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:16:18,985 INFO L225 Difference]: With dead ends: 86 [2021-12-16 00:16:18,985 INFO L226 Difference]: Without dead ends: 83 [2021-12-16 00:16:18,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:16:18,988 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-16 00:16:18,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-12-16 00:16:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-16 00:16:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-12-16 00:16:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-16 00:16:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2021-12-16 00:16:19,004 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 32 [2021-12-16 00:16:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:16:19,006 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2021-12-16 00:16:19,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 00:16:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2021-12-16 00:16:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 00:16:19,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:16:19,008 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:16:19,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:16:19,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:19,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:16:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:16:19,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1526883210, now seen corresponding path program 1 times [2021-12-16 00:16:19,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:16:19,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174236876] [2021-12-16 00:16:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:19,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:16:19,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:16:19,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212662182] [2021-12-16 00:16:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:19,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:19,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:16:19,224 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) [2021-12-16 00:16:19,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process