./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.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_unwindbound2.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 ee8fbf7ad7c769bb660b4c416c89e8a6070f0c88820552e25f4a5ca5398fd5ca --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:20:09,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:20:09,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:20:09,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:20:09,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:20:09,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:20:09,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:20:09,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:20:09,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:20:09,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:20:09,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:20:09,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:20:09,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:20:09,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:20:09,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:20:09,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:20:09,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:20:09,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:20:09,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:20:09,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:20:09,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:20:09,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:20:09,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:20:09,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:20:09,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:20:09,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:20:09,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:20:09,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:20:09,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:20:09,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:20:09,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:20:09,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:20:09,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:20:09,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:20:09,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:20:09,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:20:09,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:20:09,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:20:09,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:20:09,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:20:09,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:20:09,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:20:09,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:20:09,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:20:09,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:20:09,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:20:09,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:20:09,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:20:09,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:20:09,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:20:09,389 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:20:09,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:20:09,389 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:20:09,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:20:09,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:20:09,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:20:09,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:20:09,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:20:09,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:20:09,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:20:09,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:20:09,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:20:09,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:20:09,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:20:09,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:20:09,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:20:09,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:20:09,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:20:09,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:20:09,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:20:09,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:20:09,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:20:09,392 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:20:09,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:20:09,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:20:09,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:20:09,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee8fbf7ad7c769bb660b4c416c89e8a6070f0c88820552e25f4a5ca5398fd5ca [2021-12-17 11:20:09,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:20:09,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:20:09,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:20:09,591 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:20:09,591 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:20:09,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2021-12-17 11:20:09,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243518735/e2f12028faf84ce9ae38efaf7c166f4a/FLAG71f98d0d7 [2021-12-17 11:20:10,054 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:20:10,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound2.c [2021-12-17 11:20:10,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243518735/e2f12028faf84ce9ae38efaf7c166f4a/FLAG71f98d0d7 [2021-12-17 11:20:10,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243518735/e2f12028faf84ce9ae38efaf7c166f4a [2021-12-17 11:20:10,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:20:10,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:20:10,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:20:10,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:20:10,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:20:10,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71327fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10, skipping insertion in model container [2021-12-17 11:20:10,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:20:10,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:20:10,300 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_unwindbound2.c[525,538] [2021-12-17 11:20:10,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:20:10,334 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:20:10,342 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_unwindbound2.c[525,538] [2021-12-17 11:20:10,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:20:10,364 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:20:10,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10 WrapperNode [2021-12-17 11:20:10,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:20:10,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:20:10,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:20:10,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:20:10,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,391 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-17 11:20:10,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:20:10,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:20:10,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:20:10,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:20:10,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:20:10,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:20:10,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:20:10,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:20:10,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (1/1) ... [2021-12-17 11:20:10,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:20:10,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:20:10,447 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) [2021-12-17 11:20:10,449 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 [2021-12-17 11:20:10,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:20:10,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:20:10,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:20:10,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:20:10,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:20:10,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:20:10,525 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:20:10,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:20:10,640 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:20:10,645 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:20:10,646 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 11:20:10,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:20:10 BoogieIcfgContainer [2021-12-17 11:20:10,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:20:10,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:20:10,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:20:10,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:20:10,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:20:10" (1/3) ... [2021-12-17 11:20:10,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11673d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:20:10, skipping insertion in model container [2021-12-17 11:20:10,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:20:10" (2/3) ... [2021-12-17 11:20:10,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11673d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:20:10, skipping insertion in model container [2021-12-17 11:20:10,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:20:10" (3/3) ... [2021-12-17 11:20:10,664 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound2.c [2021-12-17 11:20:10,683 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:20:10,684 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:20:10,743 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:20:10,754 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 [2021-12-17 11:20:10,760 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:20:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 11:20:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 11:20:10,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:20:10,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:20:10,794 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:20:10,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:20:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash -797370321, now seen corresponding path program 1 times [2021-12-17 11:20:10,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:20:10,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99570370] [2021-12-17 11:20:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:10,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:20:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:20:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:20:10,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:20:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99570370] [2021-12-17 11:20:10,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99570370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:20:10,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:20:10,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:20:10,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137561734] [2021-12-17 11:20:10,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:20:10,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:20:10,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:20:11,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:20:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:20:11,034 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:20:11,064 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2021-12-17 11:20:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:20:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 11:20:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:20:11,075 INFO L225 Difference]: With dead ends: 57 [2021-12-17 11:20:11,075 INFO L226 Difference]: Without dead ends: 26 [2021-12-17 11:20:11,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:20:11,083 INFO L933 BasicCegarLoop]: 42 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, 42 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 [2021-12-17 11:20:11,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:20:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-17 11:20:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-17 11:20:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 11:20:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2021-12-17 11:20:11,131 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 10 [2021-12-17 11:20:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:20:11,131 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2021-12-17 11:20:11,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2021-12-17 11:20:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 11:20:11,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:20:11,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:20:11,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:20:11,134 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:20:11,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:20:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1698606518, now seen corresponding path program 1 times [2021-12-17 11:20:11,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:20:11,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230726639] [2021-12-17 11:20:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:11,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:20:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:20:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:20:11,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:20:11,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230726639] [2021-12-17 11:20:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230726639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:20:11,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:20:11,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 11:20:11,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311434661] [2021-12-17 11:20:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:20:11,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 11:20:11,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:20:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 11:20:11,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 11:20:11,250 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:11,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:20:11,277 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-12-17 11:20:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 11:20:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 11:20:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:20:11,279 INFO L225 Difference]: With dead ends: 47 [2021-12-17 11:20:11,279 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 11:20:11,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 11:20:11,282 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:20:11,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:20:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 11:20:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-17 11:20:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 11:20:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2021-12-17 11:20:11,296 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 12 [2021-12-17 11:20:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:20:11,297 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2021-12-17 11:20:11,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2021-12-17 11:20:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 11:20:11,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:20:11,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:20:11,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 11:20:11,302 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:20:11,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:20:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash 776097594, now seen corresponding path program 1 times [2021-12-17 11:20:11,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:20:11,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235139462] [2021-12-17 11:20:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:11,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:20:11,316 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:20:11,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912562562] [2021-12-17 11:20:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:11,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:20:11,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:20:11,319 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) [2021-12-17 11:20:11,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:20:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:20:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:20:11,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:20:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:20:11,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:20:11,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:20:11,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235139462] [2021-12-17 11:20:11,477 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:20:11,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912562562] [2021-12-17 11:20:11,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912562562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:20:11,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:20:11,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 11:20:11,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790294172] [2021-12-17 11:20:11,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:20:11,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:20:11,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:20:11,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:20:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:20:11,485 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:20:11,527 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-12-17 11:20:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:20:11,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 11:20:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:20:11,529 INFO L225 Difference]: With dead ends: 41 [2021-12-17 11:20:11,529 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 11:20:11,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:20:11,530 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:20:11,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:20:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 11:20:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-12-17 11:20:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 11:20:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2021-12-17 11:20:11,538 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 13 [2021-12-17 11:20:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:20:11,538 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2021-12-17 11:20:11,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2021-12-17 11:20:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 11:20:11,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:20:11,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:20:11,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:20:11,762 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 [2021-12-17 11:20:11,763 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:20:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:20:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 777587144, now seen corresponding path program 1 times [2021-12-17 11:20:11,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:20:11,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701058399] [2021-12-17 11:20:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:11,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:20:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:20:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:20:12,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:20:12,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701058399] [2021-12-17 11:20:12,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701058399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:20:12,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:20:12,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 11:20:12,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597232399] [2021-12-17 11:20:12,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:20:12,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 11:20:12,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:20:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 11:20:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:20:12,021 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:20:12,321 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2021-12-17 11:20:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:20:12,324 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 11:20:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:20:12,325 INFO L225 Difference]: With dead ends: 64 [2021-12-17 11:20:12,325 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 11:20:12,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:20:12,326 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:20:12,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 181 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 11:20:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 11:20:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-17 11:20:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 11:20:12,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2021-12-17 11:20:12,346 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2021-12-17 11:20:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:20:12,346 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2021-12-17 11:20:12,346 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:12,346 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2021-12-17 11:20:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 11:20:12,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:20:12,347 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:20:12,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 11:20:12,348 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:20:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:20:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash 84493759, now seen corresponding path program 1 times [2021-12-17 11:20:12,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:20:12,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975179066] [2021-12-17 11:20:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:12,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:20:12,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:20:12,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589328851] [2021-12-17 11:20:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:12,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:20:12,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:20:12,364 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) [2021-12-17 11:20:12,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:20:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:20:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:20:12,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:20:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:20:12,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:20:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:20:12,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:20:12,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975179066] [2021-12-17 11:20:12,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:20:12,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589328851] [2021-12-17 11:20:12,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589328851] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:20:12,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:20:12,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-17 11:20:12,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111083115] [2021-12-17 11:20:12,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:20:12,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:20:12,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:20:12,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:20:12,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:20:12,610 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:20:12,647 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2021-12-17 11:20:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:20:12,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-17 11:20:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:20:12,649 INFO L225 Difference]: With dead ends: 63 [2021-12-17 11:20:12,649 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 11:20:12,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:20:12,650 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:20:12,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 101 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:20:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 11:20:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-17 11:20:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 11:20:12,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2021-12-17 11:20:12,664 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 15 [2021-12-17 11:20:12,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:20:12,664 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2021-12-17 11:20:12,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2021-12-17 11:20:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 11:20:12,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:20:12,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:20:12,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:20:12,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:20:12,866 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:20:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:20:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2016757679, now seen corresponding path program 1 times [2021-12-17 11:20:12,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:20:12,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646374973] [2021-12-17 11:20:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:12,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:20:12,876 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:20:12,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328070245] [2021-12-17 11:20:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:12,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:20:12,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:20:12,886 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) [2021-12-17 11:20:12,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:20:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:20:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:20:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:20:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 11:20:13,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:20:13,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:20:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646374973] [2021-12-17 11:20:13,065 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:20:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328070245] [2021-12-17 11:20:13,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328070245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:20:13,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:20:13,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:20:13,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752695827] [2021-12-17 11:20:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:20:13,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:20:13,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:20:13,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:20:13,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:20:13,069 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:20:13,303 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2021-12-17 11:20:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:20:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 11:20:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:20:13,305 INFO L225 Difference]: With dead ends: 62 [2021-12-17 11:20:13,305 INFO L226 Difference]: Without dead ends: 59 [2021-12-17 11:20:13,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:20:13,306 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:20:13,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 11:20:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-17 11:20:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-17 11:20:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 11:20:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 85 transitions. [2021-12-17 11:20:13,316 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 85 transitions. Word has length 16 [2021-12-17 11:20:13,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:20:13,316 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 85 transitions. [2021-12-17 11:20:13,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 85 transitions. [2021-12-17 11:20:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 11:20:13,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:20:13,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:20:13,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:20:13,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:20:13,524 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:20:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:20:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2015268129, now seen corresponding path program 1 times [2021-12-17 11:20:13,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:20:13,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817524319] [2021-12-17 11:20:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:13,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:20:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:20:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:20:13,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:20:13,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817524319] [2021-12-17 11:20:13,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817524319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:20:13,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425132337] [2021-12-17 11:20:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:13,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:20:13,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:20:13,628 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) [2021-12-17 11:20:13,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:20:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:20:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:20:13,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:20:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:20:13,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:20:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425132337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:20:13,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:20:13,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-17 11:20:13,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573442887] [2021-12-17 11:20:13,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:20:13,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 11:20:13,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:20:13,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 11:20:13,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:20:13,719 INFO L87 Difference]: Start difference. First operand 59 states and 85 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:20:13,762 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2021-12-17 11:20:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:20:13,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 11:20:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:20:13,763 INFO L225 Difference]: With dead ends: 71 [2021-12-17 11:20:13,763 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 11:20:13,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:20:13,768 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:20:13,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 70 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:20:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 11:20:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-17 11:20:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 11:20:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-12-17 11:20:13,791 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 16 [2021-12-17 11:20:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:20:13,792 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-12-17 11:20:13,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-12-17 11:20:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 11:20:13,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:20:13,793 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:20:13,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:20:14,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:20:14,016 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:20:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:20:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1484248551, now seen corresponding path program 1 times [2021-12-17 11:20:14,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:20:14,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329514562] [2021-12-17 11:20:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:14,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:20:14,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:20:14,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744132797] [2021-12-17 11:20:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:20:14,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:20:14,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:20:14,040 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) [2021-12-17 11:20:14,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:20:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:20:14,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:20:14,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:20:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:20:14,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:20:14,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:20:14,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329514562] [2021-12-17 11:20:14,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:20:14,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744132797] [2021-12-17 11:20:14,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744132797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:20:14,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:20:14,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:20:14,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552805716] [2021-12-17 11:20:14,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:20:14,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:20:14,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:20:14,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:20:14,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:20:14,141 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:20:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:20:14,195 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-12-17 11:20:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:20:14,195 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-17 11:20:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:20:14,196 INFO L225 Difference]: With dead ends: 43 [2021-12-17 11:20:14,196 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 11:20:14,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:20:14,197 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:20:14,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:20:14,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 11:20:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 11:20:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:20:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 11:20:14,199 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-12-17 11:20:14,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:20:14,199 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 11:20:14,199 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:20:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 11:20:14,199 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 11:20:14,201 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 11:20:14,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 11:20:14,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:20:14,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 11:20:14,654 INFO L858 garLoopResultBuilder]: For program point L31(lines 31 32) no Hoare annotation was computed. [2021-12-17 11:20:14,655 INFO L861 garLoopResultBuilder]: At program point L60(lines 20 61) the Hoare annotation is: true [2021-12-17 11:20:14,655 INFO L858 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2021-12-17 11:20:14,655 INFO L858 garLoopResultBuilder]: For program point L52-2(lines 20 61) no Hoare annotation was computed. [2021-12-17 11:20:14,655 INFO L858 garLoopResultBuilder]: For program point L44(lines 38 56) no Hoare annotation was computed. [2021-12-17 11:20:14,655 INFO L854 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~r~0#1| (* 4294967296 (div (+ |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~p~0#1| 2)) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) 1) (+ (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)) |ULTIMATE.start_main_~q~0#1|)) (<= 2 ~counter~0) (= |ULTIMATE.start_main_~q~0#1| 1) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~p~0#1| 0)) [2021-12-17 11:20:14,655 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 11:20:14,655 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 11:20:14,655 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 11:20:14,655 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= 2 ~counter~0) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~p~0#1| 0)) [2021-12-17 11:20:14,656 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~r~0#1| (* 4294967296 (div (+ |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~p~0#1| 2)) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) 1) (+ (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)) |ULTIMATE.start_main_~q~0#1|)) (<= 2 ~counter~0) (= |ULTIMATE.start_main_~q~0#1| 1) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~p~0#1| 0)) [2021-12-17 11:20:14,656 INFO L858 garLoopResultBuilder]: For program point L8(lines 8 10) no Hoare annotation was computed. [2021-12-17 11:20:14,656 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 11:20:14,656 INFO L854 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 0)) [2021-12-17 11:20:14,656 INFO L854 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~r~0#1| (* 4294967296 (div (+ |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~p~0#1| 2)) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) 1) (+ (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)) |ULTIMATE.start_main_~q~0#1|)) (<= 2 ~counter~0) (= |ULTIMATE.start_main_~q~0#1| 1) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~p~0#1| 0)) [2021-12-17 11:20:14,656 INFO L858 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-12-17 11:20:14,656 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 56) no Hoare annotation was computed. [2021-12-17 11:20:14,656 INFO L854 garLoopResultBuilder]: At program point L38-2(lines 38 56) the Hoare annotation is: (and (<= 2 ~counter~0) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~p~0#1| 0)) [2021-12-17 11:20:14,656 INFO L858 garLoopResultBuilder]: For program point L30-1(lines 30 35) no Hoare annotation was computed. [2021-12-17 11:20:14,656 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 35) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~h~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|)) (.cse2 (= |ULTIMATE.start_main_~p~0#1| 0))) (or (and (= |ULTIMATE.start_main_~q~0#1| 1) .cse0 .cse1 .cse2 (= ~counter~0 0)) (and (<= 1 ~counter~0) .cse0 .cse1 .cse2))) [2021-12-17 11:20:14,656 INFO L858 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2021-12-17 11:20:14,657 INFO L854 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~r~0#1| (* 4294967296 (div (+ |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~p~0#1| 2)) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) 1) (+ (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)) |ULTIMATE.start_main_~q~0#1|)) (<= 2 ~counter~0) (= |ULTIMATE.start_main_~q~0#1| 1) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~p~0#1| 0)) [2021-12-17 11:20:14,657 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~r~0#1| (* 4294967296 (div (+ |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~p~0#1| 2)) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) 1) (+ (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)) |ULTIMATE.start_main_~q~0#1|)) (<= 2 ~counter~0) (= |ULTIMATE.start_main_~q~0#1| 1) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~p~0#1| 0)) [2021-12-17 11:20:14,657 INFO L854 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~r~0#1| (* 4294967296 (div (+ |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~p~0#1| 2)) 4294967296)) (* 4294967296 (div |ULTIMATE.start_main_~q~0#1| 4294967296)) 1) (+ (* 4294967296 (div |ULTIMATE.start_main_~r~0#1| 4294967296)) |ULTIMATE.start_main_~q~0#1|)) (<= 2 ~counter~0) (= |ULTIMATE.start_main_~q~0#1| 1) (= |ULTIMATE.start_main_~h~0#1| 0) (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~p~0#1| 0)) [2021-12-17 11:20:14,657 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-12-17 11:20:14,657 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-12-17 11:20:14,657 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-12-17 11:20:14,657 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-12-17 11:20:14,657 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-12-17 11:20:14,657 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-12-17 11:20:14,661 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:20:14,662 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 11:20:14,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 11:20:14 BoogieIcfgContainer [2021-12-17 11:20:14,673 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 11:20:14,673 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 11:20:14,673 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 11:20:14,674 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 11:20:14,674 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:20:10" (3/4) ... [2021-12-17 11:20:14,676 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 11:20:14,681 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-17 11:20:14,684 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-17 11:20:14,684 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 11:20:14,684 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 11:20:14,684 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 11:20:14,716 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 11:20:14,716 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 11:20:14,717 INFO L158 Benchmark]: Toolchain (without parser) took 4611.19ms. Allocated memory was 86.0MB in the beginning and 132.1MB in the end (delta: 46.1MB). Free memory was 53.4MB in the beginning and 106.8MB in the end (delta: -53.4MB). Peak memory consumption was 40.0MB. Max. memory is 16.1GB. [2021-12-17 11:20:14,717 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 86.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:20:14,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.12ms. Allocated memory is still 86.0MB. Free memory was 53.2MB in the beginning and 60.5MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 11:20:14,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.04ms. Allocated memory is still 86.0MB. Free memory was 60.5MB in the beginning and 58.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:20:14,718 INFO L158 Benchmark]: Boogie Preprocessor took 30.83ms. Allocated memory is still 86.0MB. Free memory was 58.8MB in the beginning and 57.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:20:14,718 INFO L158 Benchmark]: RCFGBuilder took 223.84ms. Allocated memory is still 86.0MB. Free memory was 57.4MB in the beginning and 46.8MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 11:20:14,718 INFO L158 Benchmark]: TraceAbstraction took 4021.96ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 46.1MB in the beginning and 35.4MB in the end (delta: 10.7MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. [2021-12-17 11:20:14,719 INFO L158 Benchmark]: Witness Printer took 42.74ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 34.5MB in the beginning and 106.8MB in the end (delta: -72.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:20:14,720 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 86.0MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.12ms. Allocated memory is still 86.0MB. Free memory was 53.2MB in the beginning and 60.5MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.04ms. Allocated memory is still 86.0MB. Free memory was 60.5MB in the beginning and 58.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.83ms. Allocated memory is still 86.0MB. Free memory was 58.8MB in the beginning and 57.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 223.84ms. Allocated memory is still 86.0MB. Free memory was 57.4MB in the beginning and 46.8MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4021.96ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 46.1MB in the beginning and 35.4MB in the end (delta: 10.7MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. * Witness Printer took 42.74ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 34.5MB in the beginning and 106.8MB in the end (delta: -72.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.9s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 85 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 71 mSDsluCounter, 847 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 553 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 161 IncrementalHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 294 mSDtfsCounter, 161 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=6, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 76 PreInvPairs, 89 NumberOfFragments, 311 HoareAnnotationTreeSize, 76 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 153 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 517 SizeOfPredicates, 6 NumberOfNonLiveVariables, 332 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 9/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((((q == 1 && h == 0) && r == n) && p == 0) && counter == 0) || (((1 <= counter && h == 0) && r == n) && p == 0) RESULT: Ultimate proved your program to be correct! [2021-12-17 11:20:14,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE