./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.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_unwindbound20.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 68bb6d7d6818d105c8d36601291f0fbd6a765091c35c37006c1280fceb3f620a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:03:26,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:03:26,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:03:26,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:03:26,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:03:26,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:03:26,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:03:26,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:03:26,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:03:26,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:03:26,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:03:26,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:03:26,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:03:26,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:03:26,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:03:26,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:03:26,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:03:26,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:03:26,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:03:26,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:03:26,929 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:03:26,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:03:26,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:03:26,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:03:26,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:03:26,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:03:26,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:03:26,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:03:26,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:03:26,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:03:26,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:03:26,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:03:26,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:03:26,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:03:26,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:03:26,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:03:26,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:03:26,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:03:26,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:03:26,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:03:26,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:03:26,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:03:26,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:03:26,961 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:03:26,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:03:26,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:03:26,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:03:26,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:03:26,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:03:26,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:03:26,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:03:26,964 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:03:26,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:03:26,965 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:03:26,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:03:26,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:03:26,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:03:26,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:03:26,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:03:26,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:03:26,966 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:03:26,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:03:26,967 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:03:26,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:03:26,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:03:26,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:03:26,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:03:26,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:03:26,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:03:26,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:03:26,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:03:26,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:03:26,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:03:26,970 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:03:26,970 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:03:26,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:03:26,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68bb6d7d6818d105c8d36601291f0fbd6a765091c35c37006c1280fceb3f620a [2022-07-13 16:03:27,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:03:27,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:03:27,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:03:27,181 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:03:27,181 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:03:27,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c [2022-07-13 16:03:27,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b48affdfc/260e2570a4094c358fd5b5f4d3316b59/FLAG76dee8aea [2022-07-13 16:03:27,637 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:03:27,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound20.c [2022-07-13 16:03:27,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b48affdfc/260e2570a4094c358fd5b5f4d3316b59/FLAG76dee8aea [2022-07-13 16:03:28,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b48affdfc/260e2570a4094c358fd5b5f4d3316b59 [2022-07-13 16:03:28,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:03:28,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:03:28,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:03:28,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:03:28,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:03:28,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38540f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28, skipping insertion in model container [2022-07-13 16:03:28,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:03:28,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:03:28,174 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_unwindbound20.c[597,610] [2022-07-13 16:03:28,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:03:28,231 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:03:28,242 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_unwindbound20.c[597,610] [2022-07-13 16:03:28,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:03:28,260 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:03:28,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28 WrapperNode [2022-07-13 16:03:28,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:03:28,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:03:28,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:03:28,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:03:28,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,286 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-07-13 16:03:28,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:03:28,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:03:28,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:03:28,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:03:28,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:03:28,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:03:28,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:03:28,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:03:28,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (1/1) ... [2022-07-13 16:03:28,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:03:28,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:28,326 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 16:03:28,335 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 16:03:28,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:03:28,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:03:28,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:03:28,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:03:28,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:03:28,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:03:28,397 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:03:28,398 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:03:28,488 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:03:28,493 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:03:28,493 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 16:03:28,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:03:28 BoogieIcfgContainer [2022-07-13 16:03:28,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:03:28,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:03:28,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:03:28,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:03:28,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:03:28" (1/3) ... [2022-07-13 16:03:28,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a098e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:03:28, skipping insertion in model container [2022-07-13 16:03:28,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:03:28" (2/3) ... [2022-07-13 16:03:28,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a098e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:03:28, skipping insertion in model container [2022-07-13 16:03:28,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:03:28" (3/3) ... [2022-07-13 16:03:28,508 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound20.c [2022-07-13 16:03:28,520 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:03:28,520 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:03:28,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:03:28,565 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@c64a6e3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3892430 [2022-07-13 16:03:28,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:03:28,569 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 16:03:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 16:03:28,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:28,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:03:28,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:28,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash 180444447, now seen corresponding path program 1 times [2022-07-13 16:03:28,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:28,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112442566] [2022-07-13 16:03:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:28,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:28,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:28,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096337611] [2022-07-13 16:03:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:28,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:28,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:28,672 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 16:03:28,674 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 16:03:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:03:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 16:03:28,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:03:28,964 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 16:03:28,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:03:28,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:03:28,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112442566] [2022-07-13 16:03:28,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:03:28,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096337611] [2022-07-13 16:03:28,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096337611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:03:28,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:03:28,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 16:03:28,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826474652] [2022-07-13 16:03:28,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:03:28,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:03:28,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:03:29,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:03:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:03:29,003 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 16:03:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:29,110 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-07-13 16:03:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:03:29,112 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 16:03:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:29,118 INFO L225 Difference]: With dead ends: 54 [2022-07-13 16:03:29,118 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 16:03:29,121 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 16:03:29,128 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:03:29,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:03:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 16:03:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-13 16:03:29,160 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 16:03:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-13 16:03:29,162 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 8 [2022-07-13 16:03:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:29,162 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-13 16:03:29,162 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 16:03:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-13 16:03:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 16:03:29,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:29,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:03:29,181 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 16:03:29,371 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 16:03:29,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:29,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2080570626, now seen corresponding path program 1 times [2022-07-13 16:03:29,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:29,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688607813] [2022-07-13 16:03:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:29,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:29,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:29,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245149925] [2022-07-13 16:03:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:29,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:29,399 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 16:03:29,402 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 16:03:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:03:29,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 16:03:29,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:03:29,650 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 16:03:29,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:03:29,785 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 16:03:29,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:03:29,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688607813] [2022-07-13 16:03:29,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:03:29,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245149925] [2022-07-13 16:03:29,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245149925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:03:29,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:03:29,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-07-13 16:03:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229558215] [2022-07-13 16:03:29,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:03:29,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 16:03:29,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:03:29,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 16:03:29,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:03:29,797 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 16:03:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:30,107 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-13 16:03:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 16:03:30,109 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 16:03:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:30,110 INFO L225 Difference]: With dead ends: 41 [2022-07-13 16:03:30,110 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 16:03:30,110 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 16:03:30,111 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 16:03:30,112 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 16:03:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 16:03:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-07-13 16:03:30,122 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 16:03:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-13 16:03:30,124 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2022-07-13 16:03:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:30,124 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-13 16:03:30,125 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 16:03:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-13 16:03:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 16:03:30,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:30,127 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 16:03:30,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 16:03:30,350 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 16:03:30,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash 680664555, now seen corresponding path program 1 times [2022-07-13 16:03:30,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:30,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330857085] [2022-07-13 16:03:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:30,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:30,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:30,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338965867] [2022-07-13 16:03:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:30,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:30,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:30,364 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 16:03:30,379 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 16:03:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:03:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:03:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:03:30,446 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 16:03:30,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:03:30,474 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 16:03:30,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:03:30,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330857085] [2022-07-13 16:03:30,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:03:30,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338965867] [2022-07-13 16:03:30,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338965867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:03:30,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:03:30,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-13 16:03:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995548114] [2022-07-13 16:03:30,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:03:30,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 16:03:30,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:03:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 16:03:30,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:03:30,478 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 16:03:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:30,538 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-07-13 16:03:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 16:03:30,538 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 16:03:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:30,542 INFO L225 Difference]: With dead ends: 73 [2022-07-13 16:03:30,542 INFO L226 Difference]: Without dead ends: 67 [2022-07-13 16:03:30,543 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 16:03:30,546 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 16:03:30,550 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 16:03:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-13 16:03:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2022-07-13 16:03:30,560 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 16:03:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-13 16:03:30,561 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 19 [2022-07-13 16:03:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:30,562 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-13 16:03:30,562 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 16:03:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-13 16:03:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 16:03:30,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:30,563 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 16:03:30,590 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 16:03:30,780 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 16:03:30,781 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:30,781 INFO L85 PathProgramCache]: Analyzing trace with hash 713886481, now seen corresponding path program 1 times [2022-07-13 16:03:30,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:30,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912214698] [2022-07-13 16:03:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:30,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:30,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:30,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383963923] [2022-07-13 16:03:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:30,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:30,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:30,793 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 16:03:30,794 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 16:03:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:03:30,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 16:03:30,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:03:31,130 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 16:03:31,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:03:31,546 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 16:03:31,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:03:31,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912214698] [2022-07-13 16:03:31,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:03:31,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383963923] [2022-07-13 16:03:31,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383963923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:03:31,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:03:31,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-07-13 16:03:31,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78880968] [2022-07-13 16:03:31,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:03:31,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 16:03:31,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:03:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 16:03:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-13 16:03:31,550 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 16:03:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:32,170 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-07-13 16:03:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 16:03:32,171 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 16:03:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:32,171 INFO L225 Difference]: With dead ends: 81 [2022-07-13 16:03:32,172 INFO L226 Difference]: Without dead ends: 73 [2022-07-13 16:03:32,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 16:03:32,173 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 16:03:32,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 106 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 271 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-07-13 16:03:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-13 16:03:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-07-13 16:03:32,189 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 16:03:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-07-13 16:03:32,191 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 25 [2022-07-13 16:03:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:32,195 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-07-13 16:03:32,195 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 16:03:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-07-13 16:03:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 16:03:32,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:32,196 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 16:03:32,223 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 16:03:32,409 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 16:03:32,410 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:32,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2021783820, now seen corresponding path program 1 times [2022-07-13 16:03:32,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:32,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619822617] [2022-07-13 16:03:32,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:32,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:32,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:32,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097674304] [2022-07-13 16:03:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:32,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:32,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:32,422 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 16:03:32,423 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 16:03:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:03:32,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 16:03:32,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:03:37,451 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 16:03:37,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:03:37,610 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 16:03:37,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:03:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619822617] [2022-07-13 16:03:37,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:03:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097674304] [2022-07-13 16:03:37,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097674304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:03:37,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:03:37,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-07-13 16:03:37,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972589660] [2022-07-13 16:03:37,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:03:37,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 16:03:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:03:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 16:03:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:03:37,613 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 16:03:39,623 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 16:03:43,684 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:03:45,689 WARN L534 Checker$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 16:03:47,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:03:49,751 WARN L534 Checker$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 16:03:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:52,010 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-07-13 16:03:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:03:52,011 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 16:03:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:52,012 INFO L225 Difference]: With dead ends: 92 [2022-07-13 16:03:52,012 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 16:03:52,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2022-07-13 16:03:52,013 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 16:03:52,014 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 16:03:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 16:03:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-07-13 16:03:52,034 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 16:03:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-07-13 16:03:52,038 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 35 [2022-07-13 16:03:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:52,039 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-07-13 16:03:52,040 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 16:03:52,040 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-07-13 16:03:52,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 16:03:52,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:52,042 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 16:03:52,068 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 16:03:52,263 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 16:03:52,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2132634866, now seen corresponding path program 1 times [2022-07-13 16:03:52,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:52,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455341753] [2022-07-13 16:03:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:52,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:52,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:52,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060482959] [2022-07-13 16:03:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:52,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:52,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:52,277 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 16:03:52,278 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 16:03:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:03:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:03:52,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:03:52,477 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 16:03:52,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:03:52,608 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 16:03:52,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:03:52,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455341753] [2022-07-13 16:03:52,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:03:52,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060482959] [2022-07-13 16:03:52,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060482959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:03:52,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:03:52,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-13 16:03:52,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871515486] [2022-07-13 16:03:52,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:03:52,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 16:03:52,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:03:52,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 16:03:52,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:03:52,612 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 16:03:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:52,796 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2022-07-13 16:03:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:03:52,796 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 16:03:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:52,797 INFO L225 Difference]: With dead ends: 93 [2022-07-13 16:03:52,797 INFO L226 Difference]: Without dead ends: 87 [2022-07-13 16:03:52,798 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 16:03:52,798 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 16:03:52,799 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 16:03:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-13 16:03:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2022-07-13 16:03:52,811 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 16:03:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2022-07-13 16:03:52,811 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 35 [2022-07-13 16:03:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:52,812 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2022-07-13 16:03:52,812 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 16:03:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2022-07-13 16:03:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 16:03:52,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:52,813 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 16:03:52,841 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 16:03:53,030 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 16:03:53,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1410392757, now seen corresponding path program 2 times [2022-07-13 16:03:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:53,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447065926] [2022-07-13 16:03:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:53,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:53,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:53,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553798493] [2022-07-13 16:03:53,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:03:53,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:53,049 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 16:03:53,050 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 16:03:53,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:03:53,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:03:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:03:53,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:03:53,243 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 16:03:53,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:03:53,369 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 16:03:53,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:03:53,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447065926] [2022-07-13 16:03:53,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:03:53,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553798493] [2022-07-13 16:03:53,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553798493] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:03:53,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:03:53,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-13 16:03:53,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633741718] [2022-07-13 16:03:53,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:03:53,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 16:03:53,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:03:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 16:03:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-13 16:03:53,371 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 16:03:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:03:53,550 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2022-07-13 16:03:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:03:53,550 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 16:03:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:03:53,551 INFO L225 Difference]: With dead ends: 104 [2022-07-13 16:03:53,551 INFO L226 Difference]: Without dead ends: 98 [2022-07-13 16:03:53,552 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 16:03:53,552 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 16:03:53,553 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 16:03:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-13 16:03:53,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2022-07-13 16:03:53,569 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 16:03:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2022-07-13 16:03:53,570 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 45 [2022-07-13 16:03:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:03:53,570 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2022-07-13 16:03:53,571 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 16:03:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2022-07-13 16:03:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 16:03:53,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:03:53,577 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 16:03:53,593 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 16:03:53,779 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 16:03:53,780 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:03:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:03:53,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1900020427, now seen corresponding path program 3 times [2022-07-13 16:03:53,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:03:53,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565810507] [2022-07-13 16:03:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:03:53,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:03:53,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:03:53,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808853624] [2022-07-13 16:03:53,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 16:03:53,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:03:53,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:03:53,804 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 16:03:53,804 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 16:03:54,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 16:03:54,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:03:54,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 16:03:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:04:22,953 WARN L233 SmtUtils]: Spent 17.57s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 16:05:44,529 WARN L833 $PredicateComparison]: unable to prove that (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and (<= 0 |c___VERIFIER_assert_#in~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 16:07:38,790 WARN L233 SmtUtils]: Spent 14.03s 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)