./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/bresenham-ll_unwindbound10.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 d8ee33f278cd93a3b1e0d551730c6407889b70e338ebc3c857541220d9b0f75f --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:02:35,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:02:35,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:02:35,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:02:35,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:02:35,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:02:35,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:02:35,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:02:35,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:02:35,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:02:35,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:02:35,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:02:35,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:02:35,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:02:35,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:02:35,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:02:35,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:02:35,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:02:35,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:02:35,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:02:35,392 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:02:35,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:02:35,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:02:35,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:02:35,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:02:35,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:02:35,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:02:35,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:02:35,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:02:35,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:02:35,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:02:35,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:02:35,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:02:35,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:02:35,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:02:35,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:02:35,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:02:35,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:02:35,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:02:35,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:02:35,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:02:35,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:02:35,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:02:35,429 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:02:35,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:02:35,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:02:35,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:02:35,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:02:35,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:02:35,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:02:35,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:02:35,432 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:02:35,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:02:35,432 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:02:35,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:02:35,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:02:35,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:02:35,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:02:35,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:02:35,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:02:35,434 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:02:35,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:02:35,435 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:02:35,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:02:35,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:02:35,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:02:35,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:02:35,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:02:35,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:02:35,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:02:35,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:02:35,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:02:35,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:02:35,437 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:02:35,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:02:35,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:02:35,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8ee33f278cd93a3b1e0d551730c6407889b70e338ebc3c857541220d9b0f75f [2022-07-13 16:02:35,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:02:35,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:02:35,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:02:35,683 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:02:35,684 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:02:35,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2022-07-13 16:02:35,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2d32679/e3dcc57d903d4e9c9ed260d1487b3961/FLAG70dcdb6af [2022-07-13 16:02:36,070 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:02:36,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2022-07-13 16:02:36,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2d32679/e3dcc57d903d4e9c9ed260d1487b3961/FLAG70dcdb6af [2022-07-13 16:02:36,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2d32679/e3dcc57d903d4e9c9ed260d1487b3961 [2022-07-13 16:02:36,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:02:36,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:02:36,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:02:36,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:02:36,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:02:36,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b295434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36, skipping insertion in model container [2022-07-13 16:02:36,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:02:36,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:02:36,229 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/bresenham-ll_unwindbound10.c[597,610] [2022-07-13 16:02:36,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:02:36,253 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:02:36,265 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/bresenham-ll_unwindbound10.c[597,610] [2022-07-13 16:02:36,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:02:36,304 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:02:36,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36 WrapperNode [2022-07-13 16:02:36,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:02:36,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:02:36,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:02:36,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:02:36,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,337 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-07-13 16:02:36,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:02:36,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:02:36,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:02:36,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:02:36,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:02:36,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:02:36,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:02:36,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:02:36,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (1/1) ... [2022-07-13 16:02:36,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:02:36,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:02:36,382 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) [2022-07-13 16:02:36,388 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 [2022-07-13 16:02:36,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:02:36,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:02:36,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:02:36,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:02:36,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:02:36,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:02:36,444 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:02:36,445 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:02:36,528 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:02:36,532 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:02:36,532 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 16:02:36,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:02:36 BoogieIcfgContainer [2022-07-13 16:02:36,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:02:36,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:02:36,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:02:36,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:02:36,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:02:36" (1/3) ... [2022-07-13 16:02:36,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce4dfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:02:36, skipping insertion in model container [2022-07-13 16:02:36,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:02:36" (2/3) ... [2022-07-13 16:02:36,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce4dfe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:02:36, skipping insertion in model container [2022-07-13 16:02:36,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:02:36" (3/3) ... [2022-07-13 16:02:36,539 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound10.c [2022-07-13 16:02:36,549 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:02:36,550 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:02:36,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:02:36,589 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1bbf6086, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5906d6c9 [2022-07-13 16:02:36,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:02:36,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:02:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 16:02:36,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:02:36,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:02:36,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:02:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:02:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash 180444447, now seen corresponding path program 1 times [2022-07-13 16:02:36,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:02:36,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610486702] [2022-07-13 16:02:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:36,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:02:36,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:02:36,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995955424] [2022-07-13 16:02:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:36,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:02:36,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:02:36,690 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) [2022-07-13 16:02:36,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 16:02:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:02:36,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 16:02:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:02:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:02:36,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:02:36,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:02:36,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610486702] [2022-07-13 16:02:36,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:02:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995955424] [2022-07-13 16:02:36,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995955424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:02:36,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:02:36,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 16:02:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654171026] [2022-07-13 16:02:36,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:02:36,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:02:36,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:02:36,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:02:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:02:36,932 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-07-13 16:02:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:02:37,012 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-07-13 16:02:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:02:37,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 8 [2022-07-13 16:02:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:02:37,019 INFO L225 Difference]: With dead ends: 54 [2022-07-13 16:02:37,019 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 16:02:37,021 INFO L412 NwaCegarLoop]: 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 [2022-07-13 16:02:37,023 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:02:37,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:02:37,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 16:02:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-13 16:02:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:02:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-13 16:02:37,053 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 8 [2022-07-13 16:02:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:02:37,053 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-13 16:02:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-07-13 16:02:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-13 16:02:37,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 16:02:37,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:02:37,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:02:37,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 16:02:37,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-13 16:02:37,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:02:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:02:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2080570626, now seen corresponding path program 1 times [2022-07-13 16:02:37,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:02:37,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355101912] [2022-07-13 16:02:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:37,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:02:37,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:02:37,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564625455] [2022-07-13 16:02:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:37,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:02:37,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:02:37,302 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) [2022-07-13 16:02:37,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 16:02:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:02:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 16:02:37,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:02:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:02:37,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:02:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 16:02:37,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:02:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355101912] [2022-07-13 16:02:37,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:02:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564625455] [2022-07-13 16:02:37,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564625455] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:02:37,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:02:37,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-07-13 16:02:37,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986150250] [2022-07-13 16:02:37,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:02:37,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 16:02:37,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:02:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 16:02:37,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:02:37,621 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:02:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:02:37,830 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-13 16:02:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:02:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-13 16:02:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:02:37,832 INFO L225 Difference]: With dead ends: 41 [2022-07-13 16:02:37,832 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 16:02:37,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-13 16:02:37,833 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:02:37,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 16:02:37,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 16:02:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-07-13 16:02:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 16:02:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-13 16:02:37,838 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2022-07-13 16:02:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:02:37,839 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-13 16:02:37,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:02:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-13 16:02:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 16:02:37,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:02:37,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:02:37,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 16:02:38,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-13 16:02:38,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:02:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:02:38,056 INFO L85 PathProgramCache]: Analyzing trace with hash 680664555, now seen corresponding path program 1 times [2022-07-13 16:02:38,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:02:38,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397485428] [2022-07-13 16:02:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:38,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:02:38,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:02:38,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740846495] [2022-07-13 16:02:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:38,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:02:38,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:02:38,065 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) [2022-07-13 16:02:38,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 16:02:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:02:38,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:02:38,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:02:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:02:38,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:02:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 16:02:38,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:02:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397485428] [2022-07-13 16:02:38,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:02:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740846495] [2022-07-13 16:02:38,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740846495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:02:38,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:02:38,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-13 16:02:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110582819] [2022-07-13 16:02:38,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:02:38,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 16:02:38,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:02:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 16:02:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:02:38,143 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:02:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:02:38,185 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-07-13 16:02:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 16:02:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-13 16:02:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:02:38,186 INFO L225 Difference]: With dead ends: 73 [2022-07-13 16:02:38,186 INFO L226 Difference]: Without dead ends: 67 [2022-07-13 16:02:38,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:02:38,187 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:02:38,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 100 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:02:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-13 16:02:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2022-07-13 16:02:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 16:02:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-13 16:02:38,195 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 19 [2022-07-13 16:02:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:02:38,195 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-13 16:02:38,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:02:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-13 16:02:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 16:02:38,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:02:38,196 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:02:38,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:02:38,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:02:38,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:02:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:02:38,412 INFO L85 PathProgramCache]: Analyzing trace with hash 713886481, now seen corresponding path program 1 times [2022-07-13 16:02:38,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:02:38,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925482299] [2022-07-13 16:02:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:38,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:02:38,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:02:38,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77840769] [2022-07-13 16:02:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:38,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:02:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:02:38,426 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) [2022-07-13 16:02:38,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 16:02:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:02:38,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 16:02:38,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:02:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 16:02:38,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:02:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 16:02:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:02:39,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925482299] [2022-07-13 16:02:39,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:02:39,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77840769] [2022-07-13 16:02:39,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77840769] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:02:39,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:02:39,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-07-13 16:02:39,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623891673] [2022-07-13 16:02:39,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:02:39,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 16:02:39,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:02:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 16:02:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-13 16:02:39,040 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 22 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 16:02:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:02:39,590 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-07-13 16:02:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 16:02:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-07-13 16:02:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:02:39,591 INFO L225 Difference]: With dead ends: 81 [2022-07-13 16:02:39,592 INFO L226 Difference]: Without dead ends: 73 [2022-07-13 16:02:39,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 16:02:39,593 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:02:39,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 106 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 271 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-07-13 16:02:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-13 16:02:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-07-13 16:02:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:02:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-07-13 16:02:39,604 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 25 [2022-07-13 16:02:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:02:39,604 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-07-13 16:02:39,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 16:02:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-07-13 16:02:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 16:02:39,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:02:39,605 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:02:39,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 16:02:39,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:02:39,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:02:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:02:39,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2021783820, now seen corresponding path program 1 times [2022-07-13 16:02:39,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:02:39,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359474905] [2022-07-13 16:02:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:39,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:02:39,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:02:39,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564704151] [2022-07-13 16:02:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:02:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:02:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:02:39,853 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) [2022-07-13 16:02:39,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 16:02:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:02:39,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 16:02:39,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:02:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 16:02:47,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:02:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 16:02:47,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:02:47,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359474905] [2022-07-13 16:02:47,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:02:47,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564704151] [2022-07-13 16:02:47,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564704151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:02:47,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:02:47,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-07-13 16:02:47,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420675863] [2022-07-13 16:02:47,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:02:47,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 16:02:47,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:02:47,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 16:02:47,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:02:47,174 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 14 states, 10 states have (on average 2.4) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 16:02:49,181 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 [] [2022-07-13 16:02:53,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:02:55,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:02:57,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:02:59,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:03:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:01,500 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-07-13 16:03:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:03:01,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.4) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2022-07-13 16:03:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:01,501 INFO L225 Difference]: With dead ends: 92 [2022-07-13 16:03:01,501 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 16:03:01,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2022-07-13 16:03:01,502 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 13 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:03:01,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 59 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 116 Invalid, 5 Unknown, 0 Unchecked, 10.1s Time] [2022-07-13 16:03:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 16:03:01,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-07-13 16:03:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.173913043478261) internal successors, (81), 69 states have internal predecessors, (81), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 16:03:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-07-13 16:03:01,517 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 35 [2022-07-13 16:03:01,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:01,517 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-07-13 16:03:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.4) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 16:03:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-07-13 16:03:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 16:03:01,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:01,518 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:03:01,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 16:03:01,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:01,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2132634866, now seen corresponding path program 1 times [2022-07-13 16:03:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057919167] [2022-07-13 16:03:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:01,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:01,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:01,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866814795] [2022-07-13 16:03:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:01,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:01,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:01,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:03:01,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 16:03:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:03:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:03:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:03:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:03:01,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:03:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 16:03:02,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:03:02,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057919167] [2022-07-13 16:03:02,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:03:02,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866814795] [2022-07-13 16:03:02,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866814795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:03:02,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:03:02,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-13 16:03:02,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864677587] [2022-07-13 16:03:02,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:03:02,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 16:03:02,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:03:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 16:03:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:03:02,044 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:03:02,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:02,177 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2022-07-13 16:03:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:03:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 35 [2022-07-13 16:03:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:02,178 INFO L225 Difference]: With dead ends: 93 [2022-07-13 16:03:02,178 INFO L226 Difference]: Without dead ends: 87 [2022-07-13 16:03:02,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-07-13 16:03:02,179 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:03:02,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 77 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:03:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-13 16:03:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2022-07-13 16:03:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 16:03:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2022-07-13 16:03:02,188 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 35 [2022-07-13 16:03:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:02,189 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2022-07-13 16:03:02,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 16:03:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2022-07-13 16:03:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 16:03:02,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:02,190 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:03:02,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 16:03:02,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:02,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1410392757, now seen corresponding path program 2 times [2022-07-13 16:03:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:02,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342877754] [2022-07-13 16:03:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:02,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:02,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:02,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620066339] [2022-07-13 16:03:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:03:02,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:02,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:02,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:03:02,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 16:03:02,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:03:02,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:03:02,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:03:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:03:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 16:03:02,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:03:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 16:03:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:03:02,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342877754] [2022-07-13 16:03:02,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:03:02,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620066339] [2022-07-13 16:03:02,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620066339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:03:02,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:03:02,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-13 16:03:02,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18581698] [2022-07-13 16:03:02,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:03:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 16:03:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:03:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 16:03:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:03:02,698 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 16:03:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:02,830 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2022-07-13 16:03:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:03:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2022-07-13 16:03:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:02,831 INFO L225 Difference]: With dead ends: 104 [2022-07-13 16:03:02,831 INFO L226 Difference]: Without dead ends: 98 [2022-07-13 16:03:02,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-07-13 16:03:02,832 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:03:02,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 79 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:03:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-13 16:03:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2022-07-13 16:03:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 16:03:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2022-07-13 16:03:02,842 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 45 [2022-07-13 16:03:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:02,842 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2022-07-13 16:03:02,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 16:03:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2022-07-13 16:03:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 16:03:02,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:02,843 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:03:02,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 16:03:03,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:03,061 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:03,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1900020427, now seen corresponding path program 3 times [2022-07-13 16:03:03,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:03,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445453598] [2022-07-13 16:03:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:03,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:03,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:03,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285065094] [2022-07-13 16:03:03,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:03:03,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:03,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:03,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:03:03,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 16:03:04,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 16:03:04,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:03:04,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 16:03:04,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:04:57,994 WARN L233 SmtUtils]: Spent 12.49s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:06:24,478 WARN L833 $PredicateComparison]: unable to prove that (or (<= 1 c___VERIFIER_assert_~cond) (and (<= 0 c___VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17| Int) (|aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| Int) (|aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| Int) (|aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| Int) (|v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141| Int) (|aux_div_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127| Int)) (let ((.cse0 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse11 (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| 2))) (let ((.cse2 (+ .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse5 (+ (* (- 1) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|) (* (- 1) |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|) .cse0)) (.cse6 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse9 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| 2 |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse4 (+ (* 2 |aux_div_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141|) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse7 (* (- 1) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|)) (.cse8 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|)) (.cse1 (+ (* |aux_div_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127| 2) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse3 (+ 2 .cse0))) (and (<= .cse0 .cse1) (<= 0 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|) (< |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| 2) (< .cse2 .cse3) (<= .cse0 .cse4) (<= .cse0 .cse2) (= (mod (+ |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| (- 2) .cse5)) 2) 0) (not (= |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| 0)) (<= (+ (div (+ .cse6 .cse7 .cse8 .cse9 |aux_div_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141|) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|) (+ .cse0 1)) (= (mod (+ |aux_div_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| .cse5) .cse7) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|) 0) (< .cse0 (+ (div (+ .cse6 |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| .cse7 .cse8 .cse9) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|)) (< .cse4 .cse3) (not (let ((.cse12 (* (- 2) |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|))) (let ((.cse10 (div (+ .cse7 |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| .cse8 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| 2) (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| (+ .cse12 .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|))) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|))) (= (+ (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| .cse10) 2) .cse11) (+ .cse12 (* |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| 2) (* 2 (* |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| .cse10)) .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| 2)))))) (< .cse1 .cse3))))))) is different from false [2022-07-13 16:07:11,007 WARN L833 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17| Int) (|aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| Int) (|aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| Int) (|aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| Int) (|v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141| Int) (|aux_div_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127| Int)) (let ((.cse0 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse11 (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| 2))) (let ((.cse2 (+ .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse5 (+ (* (- 1) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|) (* (- 1) |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|) .cse0)) (.cse6 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse9 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| 2 |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse4 (+ (* 2 |aux_div_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141|) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse7 (* (- 1) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|)) (.cse8 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|)) (.cse1 (+ (* |aux_div_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127| 2) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse3 (+ 2 .cse0))) (and (<= .cse0 .cse1) (<= 0 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|) (< |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| 2) (< .cse2 .cse3) (<= .cse0 .cse4) (<= .cse0 .cse2) (= (mod (+ |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| (- 2) .cse5)) 2) 0) (not (= |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| 0)) (<= (+ (div (+ .cse6 .cse7 .cse8 .cse9 |aux_div_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141|) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|) (+ .cse0 1)) (= (mod (+ |aux_div_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| .cse5) .cse7) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|) 0) (< .cse0 (+ (div (+ .cse6 |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| .cse7 .cse8 .cse9) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|)) (< .cse4 .cse3) (not (let ((.cse12 (* (- 2) |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|))) (let ((.cse10 (div (+ .cse7 |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| .cse8 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| 2) (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| (+ .cse12 .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|))) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|))) (= (+ (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| .cse10) 2) .cse11) (+ .cse12 (* |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| 2) (* 2 (* |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| .cse10)) .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| 2)))))) (< .cse1 .cse3))))) is different from false [2022-07-13 16:07:13,010 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17| Int) (|aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| Int) (|aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| Int) (|aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| Int) (|v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| Int) (|aux_div_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141| Int) (|aux_div_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127| Int)) (let ((.cse0 (* 2 |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse11 (* |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| 2))) (let ((.cse2 (+ .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse5 (+ (* (- 1) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|) (* (- 1) |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|) .cse0)) (.cse6 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse9 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| 2 |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse4 (+ (* 2 |aux_div_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141|) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse7 (* (- 1) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|)) (.cse8 (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|)) (.cse1 (+ (* |aux_div_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127| 2) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|)) (.cse3 (+ 2 .cse0))) (and (<= .cse0 .cse1) (<= 0 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|) (< |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| 2) (< .cse2 .cse3) (<= .cse0 .cse4) (<= .cse0 .cse2) (= (mod (+ |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| (- 2) .cse5)) 2) 0) (not (= |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| 0)) (<= (+ (div (+ .cse6 .cse7 .cse8 .cse9 |aux_div_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141|) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|) (+ .cse0 1)) (= (mod (+ |aux_div_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| .cse5) .cse7) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|) 0) (< .cse0 (+ (div (+ .cse6 |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| .cse7 .cse8 .cse9) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|) |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_17|)) (< .cse4 .cse3) (not (let ((.cse12 (* (- 2) |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|))) (let ((.cse10 (div (+ .cse7 |aux_div_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| .cse8 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| |aux_div_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165| 2) (* (- 1) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| (+ .cse12 .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189|))) |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16|))) (= (+ (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| .cse10) 2) .cse11) (+ .cse12 (* |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| 2) (* 2 (* |v_ULTIMATE.start_main_~Y~0#1_BEFORE_CALL_16| .cse10)) .cse11 |aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~X~0#1_BEFORE_CALL_26_127_141_165_189| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_15| 2)))))) (< .cse1 .cse3))))) is different from true [2022-07-13 16:07:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 1 not checked. [2022-07-13 16:07:13,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:07:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-13 16:07:26,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:07:26,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445453598] [2022-07-13 16:07:26,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:07:26,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285065094] [2022-07-13 16:07:26,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285065094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:07:26,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:07:26,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-07-13 16:07:26,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740758340] [2022-07-13 16:07:26,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:07:26,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 16:07:26,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:07:26,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 16:07:26,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=249, Unknown=10, NotChecked=66, Total=380 [2022-07-13 16:07:26,888 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 20 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)