./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.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_valuebound1.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 a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:15:45,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:15:45,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:15:45,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:15:45,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:15:45,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:15:45,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:15:45,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:15:45,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:15:45,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:15:45,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:15:45,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:15:45,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:15:45,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:15:45,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:15:45,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:15:45,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:15:45,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:15:45,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:15:45,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:15:45,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:15:45,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:15:45,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:15:45,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:15:45,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:15:45,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:15:45,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:15:45,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:15:45,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:15:45,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:15:45,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:15:45,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:15:45,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:15:45,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:15:45,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:15:45,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:15:45,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:15:45,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:15:45,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:15:45,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:15:45,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:15:45,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:15:45,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:15:45,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:15:45,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:15:45,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:15:45,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:15:45,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:15:45,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:15:45,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:15:45,253 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:15:45,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:15:45,254 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:15:45,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:15:45,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:15:45,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:15:45,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:15:45,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:15:45,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:15:45,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:15:45,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:15:45,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:15:45,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:15:45,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:15:45,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:15:45,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:15:45,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:15:45,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:15:45,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:15:45,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:15:45,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:15:45,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:15:45,257 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:15:45,257 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:15:45,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:15:45,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:15:45,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 [2021-12-16 00:15:45,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:15:45,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:15:45,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:15:45,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:15:45,478 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:15:45,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2021-12-16 00:15:45,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72ef5271c/55fce036c6fd4146994f91bd8aabda7f/FLAGedddd2f1d [2021-12-16 00:15:45,898 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:15:45,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2021-12-16 00:15:45,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72ef5271c/55fce036c6fd4146994f91bd8aabda7f/FLAGedddd2f1d [2021-12-16 00:15:46,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72ef5271c/55fce036c6fd4146994f91bd8aabda7f [2021-12-16 00:15:46,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:15:46,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:15:46,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:15:46,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:15:46,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:15:46,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@512b06c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46, skipping insertion in model container [2021-12-16 00:15:46,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:15:46,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:15:46,474 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_valuebound1.c[525,538] [2021-12-16 00:15:46,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:15:46,495 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:15:46,503 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_valuebound1.c[525,538] [2021-12-16 00:15:46,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:15:46,520 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:15:46,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46 WrapperNode [2021-12-16 00:15:46,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:15:46,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:15:46,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:15:46,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:15:46,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,548 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2021-12-16 00:15:46,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:15:46,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:15:46,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:15:46,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:15:46,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:15:46,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:15:46,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:15:46,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:15:46,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (1/1) ... [2021-12-16 00:15:46,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:15:46,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:15:46,603 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 00:15:46,628 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 00:15:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:15:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 00:15:46,645 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 00:15:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:15:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:15:46,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:15:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 00:15:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 00:15:46,700 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:15:46,701 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:15:46,797 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:15:46,801 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:15:46,811 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 00:15:46,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:15:46 BoogieIcfgContainer [2021-12-16 00:15:46,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:15:46,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:15:46,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:15:46,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:15:46,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:15:46" (1/3) ... [2021-12-16 00:15:46,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a46449f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:15:46, skipping insertion in model container [2021-12-16 00:15:46,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:15:46" (2/3) ... [2021-12-16 00:15:46,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a46449f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:15:46, skipping insertion in model container [2021-12-16 00:15:46,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:15:46" (3/3) ... [2021-12-16 00:15:46,818 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.c [2021-12-16 00:15:46,823 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:15:46,823 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:15:46,852 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:15:46,857 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 00:15:46,857 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:15:46,867 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 00:15:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 00:15:46,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:15:46,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:15:46,872 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:15:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:15:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash -645822239, now seen corresponding path program 1 times [2021-12-16 00:15:46,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:15:46,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781028555] [2021-12-16 00:15:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:15:46,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:15:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:46,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:15:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:47,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:15:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:47,039 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 00:15:47,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:15:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781028555] [2021-12-16 00:15:47,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781028555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:15:47,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:15:47,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 00:15:47,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723631825] [2021-12-16 00:15:47,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:15:47,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:15:47,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:15:47,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:15:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:15:47,116 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 00:15:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:15:47,131 INFO L93 Difference]: Finished difference Result 63 states and 107 transitions. [2021-12-16 00:15:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:15:47,132 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 00:15:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:15:47,137 INFO L225 Difference]: With dead ends: 63 [2021-12-16 00:15:47,137 INFO L226 Difference]: Without dead ends: 29 [2021-12-16 00:15:47,139 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 00:15:47,141 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 00:15:47,142 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 00:15:47,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-16 00:15:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-16 00:15:47,179 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 00:15:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-12-16 00:15:47,181 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 19 [2021-12-16 00:15:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:15:47,182 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-12-16 00:15:47,182 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 00:15:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-12-16 00:15:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-16 00:15:47,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:15:47,184 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 00:15:47,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 00:15:47,185 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:15:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:15:47,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1757085840, now seen corresponding path program 1 times [2021-12-16 00:15:47,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:15:47,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414373719] [2021-12-16 00:15:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:15:47,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:15:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:47,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:15:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:47,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:15:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:47,469 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 00:15:47,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:15:47,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414373719] [2021-12-16 00:15:47,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414373719] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:15:47,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:15:47,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 00:15:47,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775359595] [2021-12-16 00:15:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:15:47,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 00:15:47,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:15:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 00:15:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:15:47,474 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 00:15:49,549 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 00:15:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:15:49,659 INFO L93 Difference]: Finished difference Result 64 states and 94 transitions. [2021-12-16 00:15:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:15:49,661 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 00:15:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:15:49,662 INFO L225 Difference]: With dead ends: 64 [2021-12-16 00:15:49,662 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 00:15:49,663 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 00:15:49,664 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, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:15:49,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 188 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 00:15:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 00:15:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-12-16 00:15:49,678 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 00:15:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2021-12-16 00:15:49,682 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 20 [2021-12-16 00:15:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:15:49,683 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2021-12-16 00:15:49,683 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 00:15:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2021-12-16 00:15:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-16 00:15:49,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:15:49,686 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 00:15:49,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 00:15:49,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:15:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:15:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash -332038773, now seen corresponding path program 1 times [2021-12-16 00:15:49,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:15:49,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885968087] [2021-12-16 00:15:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:15:49,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:15:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:49,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:15:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:49,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:15:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:49,922 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 00:15:49,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:15:49,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885968087] [2021-12-16 00:15:49,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885968087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:15:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860647589] [2021-12-16 00:15:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:15:49,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:15:49,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:15:49,927 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 00:15:49,928 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 00:15:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:49,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 00:15:49,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:15:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:15:50,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:15:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:15:50,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860647589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:15:50,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:15:50,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 18 [2021-12-16 00:15:50,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035020619] [2021-12-16 00:15:50,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:15:50,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 00:15:50,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:15:50,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 00:15:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:15:50,351 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 00:15:52,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-16 00:15:53,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-16 00:15:57,940 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 00:15:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:15:58,357 INFO L93 Difference]: Finished difference Result 80 states and 116 transitions. [2021-12-16 00:15:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 00:15:58,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 22 [2021-12-16 00:15:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:15:58,358 INFO L225 Difference]: With dead ends: 80 [2021-12-16 00:15:58,358 INFO L226 Difference]: Without dead ends: 60 [2021-12-16 00:15:58,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-12-16 00:15:58,360 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-16 00:15:58,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 443 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 173 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2021-12-16 00:15:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-16 00:15:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-12-16 00:15:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-16 00:15:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2021-12-16 00:15:58,369 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 22 [2021-12-16 00:15:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:15:58,370 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2021-12-16 00:15:58,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 14 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 00:15:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2021-12-16 00:15:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 00:15:58,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:15:58,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:15:58,390 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 00:15:58,587 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 00:15:58,588 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:15:58,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:15:58,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1272106099, now seen corresponding path program 1 times [2021-12-16 00:15:58,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:15:58,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58836078] [2021-12-16 00:15:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:15:58,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:15:58,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:15:58,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061598905] [2021-12-16 00:15:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:15:58,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:15:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:15:58,600 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 00:15:58,601 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 00:15:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:15:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:15:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:15:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:15:58,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:15:58,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:15:58,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58836078] [2021-12-16 00:15:58,692 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:15:58,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061598905] [2021-12-16 00:15:58,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061598905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:15:58,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:15:58,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:15:58,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030752845] [2021-12-16 00:15:58,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:15:58,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:15:58,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:15:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:15:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:15:58,695 INFO L87 Difference]: Start difference. First operand 55 states and 76 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, (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 00:16:00,763 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 00:16:02,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-16 00:16:04,194 WARN L534 Checker$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 00:16:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:16:04,217 INFO L93 Difference]: Finished difference Result 73 states and 103 transitions. [2021-12-16 00:16:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:16:04,217 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, (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 25 [2021-12-16 00:16:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:16:04,219 INFO L225 Difference]: With dead ends: 73 [2021-12-16 00:16:04,219 INFO L226 Difference]: Without dead ends: 69 [2021-12-16 00:16:04,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 00:16:04,220 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-16 00:16:04,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 136 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-12-16 00:16:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-16 00:16:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-16 00:16:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 30 states have call successors, (30), 5 states have call predecessors, (30), 5 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-16 00:16:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2021-12-16 00:16:04,231 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 25 [2021-12-16 00:16:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:16:04,232 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2021-12-16 00:16:04,232 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, (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 00:16:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2021-12-16 00:16:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 00:16:04,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:16:04,233 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 00:16:04,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:16:04,461 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 00:16:04,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:16:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:16:04,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1041809680, now seen corresponding path program 1 times [2021-12-16 00:16:04,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:16:04,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963885938] [2021-12-16 00:16:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:04,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:16:04,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:16:04,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452402931] [2021-12-16 00:16:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:04,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:04,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:16:04,476 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 00:16:04,477 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 00:16:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:04,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:16:04,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:16:04,606 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 00:16:04,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:16:04,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:16:04,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963885938] [2021-12-16 00:16:04,607 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:16:04,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452402931] [2021-12-16 00:16:04,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452402931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:16:04,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:16:04,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:16:04,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402047257] [2021-12-16 00:16:04,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:16:04,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:16:04,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:16:04,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:16:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:16:04,610 INFO L87 Difference]: Start difference. First operand 69 states and 97 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 00:16:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:16:05,541 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2021-12-16 00:16:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:16:05,542 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 00:16:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:16:05,543 INFO L225 Difference]: With dead ends: 80 [2021-12-16 00:16:05,543 INFO L226 Difference]: Without dead ends: 57 [2021-12-16 00:16:05,543 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 00:16:05,544 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 00:16:05,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 00:16:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-16 00:16:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-16 00:16:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-16 00:16:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-12-16 00:16:05,549 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 30 [2021-12-16 00:16:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:16:05,550 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-12-16 00:16:05,550 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 00:16:05,550 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-12-16 00:16:05,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-16 00:16:05,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:16:05,550 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 00:16:05,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 00:16:05,751 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 00:16:05,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:16:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:16:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1797429611, now seen corresponding path program 1 times [2021-12-16 00:16:05,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:16:05,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351843253] [2021-12-16 00:16:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:05,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:16:05,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:16:05,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500806779] [2021-12-16 00:16:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:05,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:16:05,762 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 00:16:05,771 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 00:16:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:16:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:16:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:16:05,934 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 00:16:05,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:16:05,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:16:05,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351843253] [2021-12-16 00:16:05,937 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:16:05,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500806779] [2021-12-16 00:16:05,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500806779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:16:05,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:16:05,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:16:05,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802154862] [2021-12-16 00:16:05,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:16:05,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:16:05,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:16:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:16:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:16:05,939 INFO L87 Difference]: Start difference. First operand 57 states and 79 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 00:16:07,993 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 00:16:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:16:08,036 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2021-12-16 00:16:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:16:08,037 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 00:16:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:16:08,038 INFO L225 Difference]: With dead ends: 67 [2021-12-16 00:16:08,038 INFO L226 Difference]: Without dead ends: 65 [2021-12-16 00:16:08,038 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 00:16:08,039 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:16:08,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 150 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 00:16:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-16 00:16:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-16 00:16:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-16 00:16:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2021-12-16 00:16:08,060 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 32 [2021-12-16 00:16:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:16:08,061 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2021-12-16 00:16:08,061 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 00:16:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2021-12-16 00:16:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 00:16:08,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:16:08,071 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 00:16:08,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 00:16:08,275 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 00:16:08,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:16:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:16:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1526883210, now seen corresponding path program 1 times [2021-12-16 00:16:08,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:16:08,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540723770] [2021-12-16 00:16:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:08,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:16:08,282 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:16:08,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899858874] [2021-12-16 00:16:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:16:08,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:16:08,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:16:08,285 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 00:16:08,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process