./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/vnew2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/vnew2.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 6cb26fc448cefa547e2463448c16c0efba841bf620bbd2ba420ae15e288e3a3f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:06:21,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:06:21,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:06:21,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:06:21,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:06:21,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:06:21,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:06:21,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:06:21,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:06:21,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:06:21,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:06:21,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:06:21,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:06:21,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:06:21,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:06:21,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:06:21,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:06:21,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:06:21,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:06:21,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:06:21,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:06:21,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:06:21,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:06:21,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:06:21,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:06:21,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:06:21,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:06:21,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:06:21,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:06:21,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:06:21,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:06:21,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:06:21,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:06:21,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:06:21,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:06:21,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:06:21,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:06:21,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:06:21,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:06:21,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:06:21,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:06:21,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 00:06:21,367 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:06:21,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:06:21,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:06:21,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:06:21,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:06:21,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:06:21,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:06:21,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:06:21,369 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:06:21,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:06:21,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:06:21,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 00:06:21,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:06:21,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:06:21,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:06:21,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:06:21,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:06:21,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:06:21,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:06:21,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:06:21,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:06:21,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:06:21,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:06:21,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:06:21,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:06:21,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:06:21,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:06:21,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:06:21,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 00:06:21,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 00:06:21,371 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:06:21,371 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:06:21,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:06:21,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cb26fc448cefa547e2463448c16c0efba841bf620bbd2ba420ae15e288e3a3f [2021-12-28 00:06:21,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:06:21,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:06:21,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:06:21,619 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:06:21,620 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:06:21,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/vnew2.c [2021-12-28 00:06:21,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bed72dc3/834be929eadc4c4f96ac5115d3498a6a/FLAGc9d723238 [2021-12-28 00:06:22,078 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:06:22,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/vnew2.c [2021-12-28 00:06:22,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bed72dc3/834be929eadc4c4f96ac5115d3498a6a/FLAGc9d723238 [2021-12-28 00:06:22,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bed72dc3/834be929eadc4c4f96ac5115d3498a6a [2021-12-28 00:06:22,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:06:22,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:06:22,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:06:22,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:06:22,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:06:22,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b5fc25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22, skipping insertion in model container [2021-12-28 00:06:22,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:06:22,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:06:22,240 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/loops-crafted-1/vnew2.c[403,416] [2021-12-28 00:06:22,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:06:22,258 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:06:22,267 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/loops-crafted-1/vnew2.c[403,416] [2021-12-28 00:06:22,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:06:22,292 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:06:22,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22 WrapperNode [2021-12-28 00:06:22,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:06:22,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:06:22,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:06:22,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:06:22,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,318 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2021-12-28 00:06:22,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:06:22,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:06:22,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:06:22,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:06:22,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:06:22,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:06:22,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:06:22,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:06:22,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (1/1) ... [2021-12-28 00:06:22,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:06:22,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:06:22,417 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) [2021-12-28 00:06:22,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:06:22,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 00:06:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:06:22,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:06:22,431 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 [2021-12-28 00:06:22,496 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:06:22,497 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:06:22,611 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:06:22,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:06:22,615 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 00:06:22,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:06:22 BoogieIcfgContainer [2021-12-28 00:06:22,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:06:22,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:06:22,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:06:22,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:06:22,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:06:22" (1/3) ... [2021-12-28 00:06:22,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f715b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:06:22, skipping insertion in model container [2021-12-28 00:06:22,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:06:22" (2/3) ... [2021-12-28 00:06:22,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f715b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:06:22, skipping insertion in model container [2021-12-28 00:06:22,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:06:22" (3/3) ... [2021-12-28 00:06:22,622 INFO L111 eAbstractionObserver]: Analyzing ICFG vnew2.c [2021-12-28 00:06:22,626 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:06:22,627 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:06:22,661 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:06:22,666 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 [2021-12-28 00:06:22,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:06:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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) [2021-12-28 00:06:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 00:06:22,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:06:22,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:06:22,688 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:06:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:06:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1807091466, now seen corresponding path program 1 times [2021-12-28 00:06:22,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:06:22,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903855767] [2021-12-28 00:06:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:06:22,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:06:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:06:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:06:22,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:06:22,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903855767] [2021-12-28 00:06:22,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903855767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:06:22,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:06:22,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 00:06:22,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790027482] [2021-12-28 00:06:22,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:06:22,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 00:06:22,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:06:22,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 00:06:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:06:22,905 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-28 00:06:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:06:22,914 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2021-12-28 00:06:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 00:06:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) Word has length 7 [2021-12-28 00:06:22,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:06:22,934 INFO L225 Difference]: With dead ends: 22 [2021-12-28 00:06:22,939 INFO L226 Difference]: Without dead ends: 8 [2021-12-28 00:06:22,942 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 [2021-12-28 00:06:22,952 INFO L933 BasicCegarLoop]: 15 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, 15 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 [2021-12-28 00:06:22,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:06:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-28 00:06:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-28 00:06:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2021-12-28 00:06:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-28 00:06:22,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2021-12-28 00:06:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:06:22,976 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-28 00:06:22,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-12-28 00:06:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-28 00:06:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 00:06:22,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:06:22,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:06:22,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 00:06:22,977 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:06:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:06:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1806972302, now seen corresponding path program 1 times [2021-12-28 00:06:22,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:06:22,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141119336] [2021-12-28 00:06:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:06:22,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:06:22,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:06:22,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20463056] [2021-12-28 00:06:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:06:22,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:06:22,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:06:22,990 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) [2021-12-28 00:06:23,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 00:06:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:06:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-28 00:06:23,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:06:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:06:23,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:06:23,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:06:23,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141119336] [2021-12-28 00:06:23,103 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:06:23,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20463056] [2021-12-28 00:06:23,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20463056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:06:23,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:06:23,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 00:06:23,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574478500] [2021-12-28 00:06:23,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:06:23,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 00:06:23,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:06:23,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 00:06:23,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 00:06:23,112 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-28 00:06:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:06:23,137 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-12-28 00:06:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 00:06:23,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) Word has length 7 [2021-12-28 00:06:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:06:23,138 INFO L225 Difference]: With dead ends: 13 [2021-12-28 00:06:23,139 INFO L226 Difference]: Without dead ends: 9 [2021-12-28 00:06:23,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:06:23,140 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:06:23,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:06:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-28 00:06:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-28 00:06:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-12-28 00:06:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-12-28 00:06:23,144 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-12-28 00:06:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:06:23,144 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-12-28 00:06:23,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-28 00:06:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-12-28 00:06:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-28 00:06:23,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:06:23,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:06:23,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 00:06:23,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:06:23,350 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:06:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:06:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 183172310, now seen corresponding path program 1 times [2021-12-28 00:06:23,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:06:23,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111318575] [2021-12-28 00:06:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:06:23,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:06:23,361 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:06:23,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559127805] [2021-12-28 00:06:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:06:23,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:06:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:06:23,377 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) [2021-12-28 00:06:23,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 00:06:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:06:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 00:06:23,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:06:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:06:23,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:06:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:06:23,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:06:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111318575] [2021-12-28 00:06:23,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:06:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559127805] [2021-12-28 00:06:23,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559127805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:06:23,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:06:23,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-28 00:06:23,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799847140] [2021-12-28 00:06:23,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:06:23,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 00:06:23,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:06:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 00:06:23,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-28 00:06:23,974 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-12-28 00:06:26,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:06:30,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:06:30,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:06:30,766 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-12-28 00:06:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 00:06:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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) Word has length 8 [2021-12-28 00:06:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:06:30,767 INFO L225 Difference]: With dead ends: 20 [2021-12-28 00:06:30,767 INFO L226 Difference]: Without dead ends: 12 [2021-12-28 00:06:30,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-12-28 00:06:30,768 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-28 00:06:30,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 17 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-12-28 00:06:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-28 00:06:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-28 00:06:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2021-12-28 00:06:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-12-28 00:06:30,771 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2021-12-28 00:06:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:06:30,772 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-12-28 00:06:30,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-12-28 00:06:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-12-28 00:06:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 00:06:30,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:06:30,772 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:06:30,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 00:06:30,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-28 00:06:30,992 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:06:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:06:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash -422590578, now seen corresponding path program 2 times [2021-12-28 00:06:30,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:06:30,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049422294] [2021-12-28 00:06:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:06:31,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:06:31,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:06:31,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796932442] [2021-12-28 00:06:31,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 00:06:31,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:06:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:06:31,044 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) [2021-12-28 00:06:31,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 00:06:31,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 00:06:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:06:31,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-28 00:06:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:06:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:06:31,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:06:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:06:33,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:06:33,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049422294] [2021-12-28 00:06:33,211 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:06:33,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796932442] [2021-12-28 00:06:33,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796932442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:06:33,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:06:33,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-28 00:06:33,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129573333] [2021-12-28 00:06:33,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:06:33,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 00:06:33,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:06:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 00:06:33,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-28 00:06:33,213 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 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)