./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/egcd2-ll_unwindbound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 03:22:33,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 03:22:33,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 03:22:33,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 03:22:33,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 03:22:33,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 03:22:33,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 03:22:33,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 03:22:33,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 03:22:33,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 03:22:33,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 03:22:33,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 03:22:33,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 03:22:33,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 03:22:33,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 03:22:33,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 03:22:33,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 03:22:33,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 03:22:33,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 03:22:33,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 03:22:33,362 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 03:22:33,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 03:22:33,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 03:22:33,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 03:22:33,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 03:22:33,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 03:22:33,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 03:22:33,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 03:22:33,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 03:22:33,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 03:22:33,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 03:22:33,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 03:22:33,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 03:22:33,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 03:22:33,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 03:22:33,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 03:22:33,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 03:22:33,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 03:22:33,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 03:22:33,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 03:22:33,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 03:22:33,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 03:22:33,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 03:22:33,404 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 03:22:33,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 03:22:33,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 03:22:33,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 03:22:33,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 03:22:33,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 03:22:33,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 03:22:33,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 03:22:33,406 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 03:22:33,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 03:22:33,407 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 03:22:33,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 03:22:33,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 03:22:33,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 03:22:33,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 03:22:33,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 03:22:33,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 03:22:33,408 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 03:22:33,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 03:22:33,408 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 03:22:33,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 03:22:33,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 03:22:33,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 03:22:33,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 03:22:33,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:22:33,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 03:22:33,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 03:22:33,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 03:22:33,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 03:22:33,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 03:22:33,410 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 03:22:33,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 03:22:33,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 03:22:33,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 [2022-07-21 03:22:33,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 03:22:33,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 03:22:33,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 03:22:33,679 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 03:22:33,680 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 03:22:33,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2022-07-21 03:22:33,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9171f5b/0c5c4841f0c64299aa57d3b8c49b68a6/FLAGc0e930e98 [2022-07-21 03:22:34,056 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 03:22:34,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2022-07-21 03:22:34,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9171f5b/0c5c4841f0c64299aa57d3b8c49b68a6/FLAGc0e930e98 [2022-07-21 03:22:34,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9171f5b/0c5c4841f0c64299aa57d3b8c49b68a6 [2022-07-21 03:22:34,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 03:22:34,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 03:22:34,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 03:22:34,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 03:22:34,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 03:22:34,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d603a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34, skipping insertion in model container [2022-07-21 03:22:34,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 03:22:34,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 03:22:34,209 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/egcd2-ll_unwindbound10.c[490,503] [2022-07-21 03:22:34,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:22:34,249 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 03:22:34,266 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/egcd2-ll_unwindbound10.c[490,503] [2022-07-21 03:22:34,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 03:22:34,296 INFO L208 MainTranslator]: Completed translation [2022-07-21 03:22:34,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34 WrapperNode [2022-07-21 03:22:34,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 03:22:34,297 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 03:22:34,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 03:22:34,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 03:22:34,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,325 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-07-21 03:22:34,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 03:22:34,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 03:22:34,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 03:22:34,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 03:22:34,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 03:22:34,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 03:22:34,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 03:22:34,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 03:22:34,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (1/1) ... [2022-07-21 03:22:34,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 03:22:34,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:34,367 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) [2022-07-21 03:22:34,424 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 [2022-07-21 03:22:34,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 03:22:34,448 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-21 03:22:34,448 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-21 03:22:34,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 03:22:34,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 03:22:34,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 03:22:34,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 03:22:34,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 03:22:34,506 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 03:22:34,508 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 03:22:34,655 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 03:22:34,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 03:22:34,662 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 03:22:34,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:22:34 BoogieIcfgContainer [2022-07-21 03:22:34,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 03:22:34,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 03:22:34,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 03:22:34,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 03:22:34,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:22:34" (1/3) ... [2022-07-21 03:22:34,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6375be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:22:34, skipping insertion in model container [2022-07-21 03:22:34,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:22:34" (2/3) ... [2022-07-21 03:22:34,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6375be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:22:34, skipping insertion in model container [2022-07-21 03:22:34,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:22:34" (3/3) ... [2022-07-21 03:22:34,673 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2022-07-21 03:22:34,682 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 03:22:34,682 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 03:22:34,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 03:22:34,731 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@7a43e002, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@17800eff [2022-07-21 03:22:34,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 03:22:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 03:22:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 03:22:34,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:34,743 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:34,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2022-07-21 03:22:34,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:34,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677690996] [2022-07-21 03:22:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:34,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:34,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 03:22:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:34,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-21 03:22:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:34,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 03:22:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:34,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-21 03:22:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:22:34,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:34,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677690996] [2022-07-21 03:22:34,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677690996] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:22:34,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:22:34,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 03:22:34,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856382260] [2022-07-21 03:22:34,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:22:34,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 03:22:34,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:34,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 03:22:34,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:22:34,933 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:22:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:34,962 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2022-07-21 03:22:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 03:22:34,964 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-07-21 03:22:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:34,968 INFO L225 Difference]: With dead ends: 65 [2022-07-21 03:22:34,968 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 03:22:34,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 03:22:34,977 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:34,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:22:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 03:22:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-21 03:22:35,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:22:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-07-21 03:22:35,008 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2022-07-21 03:22:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:35,008 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-07-21 03:22:35,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:22:35,009 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-07-21 03:22:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 03:22:35,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:35,011 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:35,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 03:22:35,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2022-07-21 03:22:35,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:35,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246439409] [2022-07-21 03:22:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:35,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:35,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:35,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190760840] [2022-07-21 03:22:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:35,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:35,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:35,040 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) [2022-07-21 03:22:35,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 03:22:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:35,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 03:22:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:22:35,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:22:35,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:35,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246439409] [2022-07-21 03:22:35,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:35,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190760840] [2022-07-21 03:22:35,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190760840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:22:35,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:22:35,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 03:22:35,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609058822] [2022-07-21 03:22:35,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:22:35,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 03:22:35,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:35,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 03:22:35,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:22:35,206 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:22:35,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:35,228 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-07-21 03:22:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 03:22:35,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-07-21 03:22:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:35,229 INFO L225 Difference]: With dead ends: 40 [2022-07-21 03:22:35,229 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 03:22:35,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 03:22:35,231 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:35,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:22:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 03:22:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-21 03:22:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:22:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-07-21 03:22:35,242 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2022-07-21 03:22:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:35,243 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-07-21 03:22:35,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:22:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-07-21 03:22:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 03:22:35,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:35,244 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:35,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:35,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:35,456 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2022-07-21 03:22:35,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:35,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66781083] [2022-07-21 03:22:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:35,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:35,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:35,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898647746] [2022-07-21 03:22:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:35,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:35,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:35,472 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) [2022-07-21 03:22:35,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 03:22:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:35,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:22:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:22:35,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:22:35,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:35,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66781083] [2022-07-21 03:22:35,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:35,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898647746] [2022-07-21 03:22:35,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898647746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:22:35,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:22:35,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-21 03:22:35,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083461503] [2022-07-21 03:22:35,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:22:35,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 03:22:35,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:35,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 03:22:35,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 03:22:35,663 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:22:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:35,721 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-07-21 03:22:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:22:35,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-21 03:22:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:35,722 INFO L225 Difference]: With dead ends: 49 [2022-07-21 03:22:35,722 INFO L226 Difference]: Without dead ends: 41 [2022-07-21 03:22:35,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:22:35,723 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:35,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 92 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:22:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-21 03:22:35,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-07-21 03:22:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:22:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-07-21 03:22:35,729 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2022-07-21 03:22:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:35,729 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-07-21 03:22:35,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 03:22:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-07-21 03:22:35,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 03:22:35,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:35,730 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:35,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 03:22:35,935 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,SelfDestructingSolverStorable2 [2022-07-21 03:22:35,937 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2022-07-21 03:22:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:35,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185923850] [2022-07-21 03:22:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:35,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:35,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250799027] [2022-07-21 03:22:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:35,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:35,947 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) [2022-07-21 03:22:35,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 03:22:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 03:22:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:22:36,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:22:36,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:36,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185923850] [2022-07-21 03:22:36,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:36,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250799027] [2022-07-21 03:22:36,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250799027] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 03:22:36,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:22:36,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-21 03:22:36,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169177666] [2022-07-21 03:22:36,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:22:36,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:22:36,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:36,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:22:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:22:36,130 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:22:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:36,173 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-07-21 03:22:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:22:36,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-07-21 03:22:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:36,174 INFO L225 Difference]: With dead ends: 39 [2022-07-21 03:22:36,174 INFO L226 Difference]: Without dead ends: 37 [2022-07-21 03:22:36,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:22:36,175 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:36,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:22:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-21 03:22:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-21 03:22:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:22:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-07-21 03:22:36,180 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2022-07-21 03:22:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:36,181 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-07-21 03:22:36,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:22:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-07-21 03:22:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 03:22:36,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:36,182 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:36,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:36,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:36,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2022-07-21 03:22:36,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:36,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770673171] [2022-07-21 03:22:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:36,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:36,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:36,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581563490] [2022-07-21 03:22:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:36,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:36,424 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) [2022-07-21 03:22:36,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 03:22:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:36,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:22:36,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:22:36,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:22:36,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:36,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770673171] [2022-07-21 03:22:36,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:36,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581563490] [2022-07-21 03:22:36,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581563490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:22:36,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:22:36,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 03:22:36,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997338874] [2022-07-21 03:22:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:22:36,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:22:36,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:36,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:22:36,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:22:36,512 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:22:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:36,531 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-07-21 03:22:36,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:22:36,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-07-21 03:22:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:36,532 INFO L225 Difference]: With dead ends: 62 [2022-07-21 03:22:36,532 INFO L226 Difference]: Without dead ends: 39 [2022-07-21 03:22:36,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:22:36,535 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:36,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:22:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-21 03:22:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-21 03:22:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 03:22:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-07-21 03:22:36,540 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2022-07-21 03:22:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:36,540 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-07-21 03:22:36,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 03:22:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-07-21 03:22:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 03:22:36,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:36,541 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:36,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:36,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:36,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2022-07-21 03:22:36,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:36,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816832266] [2022-07-21 03:22:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:36,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:36,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:36,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571695486] [2022-07-21 03:22:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:36,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:36,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:36,769 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) [2022-07-21 03:22:36,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 03:22:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:36,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 03:22:36,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 03:22:36,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 03:22:36,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816832266] [2022-07-21 03:22:36,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571695486] [2022-07-21 03:22:36,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571695486] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 03:22:36,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:22:36,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-21 03:22:36,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688148975] [2022-07-21 03:22:36,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:22:36,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:22:36,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:36,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:22:36,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:22:36,990 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 03:22:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:37,026 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-07-21 03:22:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:22:37,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-07-21 03:22:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:37,029 INFO L225 Difference]: With dead ends: 53 [2022-07-21 03:22:37,029 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 03:22:37,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:22:37,031 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:37,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:22:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 03:22:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-07-21 03:22:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 03:22:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-07-21 03:22:37,038 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2022-07-21 03:22:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:37,038 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-07-21 03:22:37,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 03:22:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-07-21 03:22:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 03:22:37,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:37,039 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:37,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:37,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:37,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:37,245 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2022-07-21 03:22:37,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:37,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520657827] [2022-07-21 03:22:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:37,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:37,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:37,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956589093] [2022-07-21 03:22:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:37,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:37,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:37,253 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) [2022-07-21 03:22:37,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 03:22:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:37,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 03:22:37,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 03:22:37,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 03:22:37,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:37,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520657827] [2022-07-21 03:22:37,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:37,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956589093] [2022-07-21 03:22:37,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956589093] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 03:22:37,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:22:37,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-21 03:22:37,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555370109] [2022-07-21 03:22:37,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:22:37,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:22:37,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:37,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:22:37,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:22:37,444 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 03:22:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:37,490 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-07-21 03:22:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 03:22:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-07-21 03:22:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:37,491 INFO L225 Difference]: With dead ends: 57 [2022-07-21 03:22:37,491 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 03:22:37,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:22:37,492 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:37,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 03:22:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 03:22:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-07-21 03:22:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 03:22:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-07-21 03:22:37,499 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2022-07-21 03:22:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:37,499 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-07-21 03:22:37,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 03:22:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-07-21 03:22:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 03:22:37,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:37,500 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:37,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:37,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:37,716 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2022-07-21 03:22:37,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:37,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952414263] [2022-07-21 03:22:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:37,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:37,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:37,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578946996] [2022-07-21 03:22:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:37,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:37,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:37,724 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) [2022-07-21 03:22:37,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 03:22:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:37,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 03:22:37,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 03:22:37,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:38,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952414263] [2022-07-21 03:22:38,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:38,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578946996] [2022-07-21 03:22:38,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578946996] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 03:22:38,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:22:38,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-21 03:22:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41591571] [2022-07-21 03:22:38,067 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 03:22:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 03:22:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 03:22:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:22:38,068 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 03:22:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:38,171 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-07-21 03:22:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 03:22:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-07-21 03:22:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:38,172 INFO L225 Difference]: With dead ends: 61 [2022-07-21 03:22:38,172 INFO L226 Difference]: Without dead ends: 59 [2022-07-21 03:22:38,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-21 03:22:38,173 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:38,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 136 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:22:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-21 03:22:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-07-21 03:22:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 03:22:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-21 03:22:38,178 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2022-07-21 03:22:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:38,179 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-21 03:22:38,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 03:22:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-21 03:22:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 03:22:38,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:38,180 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:38,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:38,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:38,391 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:38,392 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2022-07-21 03:22:38,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:38,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903160627] [2022-07-21 03:22:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:38,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:38,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:38,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472457609] [2022-07-21 03:22:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:38,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:38,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:38,401 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) [2022-07-21 03:22:38,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 03:22:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:38,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:22:38,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 03:22:38,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 03:22:38,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903160627] [2022-07-21 03:22:38,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472457609] [2022-07-21 03:22:38,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472457609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:22:38,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:22:38,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-21 03:22:38,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076921664] [2022-07-21 03:22:38,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:22:38,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 03:22:38,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 03:22:38,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:22:38,561 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-21 03:22:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:38,697 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2022-07-21 03:22:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 03:22:38,699 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2022-07-21 03:22:38,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:38,703 INFO L225 Difference]: With dead ends: 211 [2022-07-21 03:22:38,703 INFO L226 Difference]: Without dead ends: 203 [2022-07-21 03:22:38,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:22:38,706 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 97 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:38,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 264 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:22:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-21 03:22:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2022-07-21 03:22:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-07-21 03:22:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2022-07-21 03:22:38,738 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2022-07-21 03:22:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:38,739 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2022-07-21 03:22:38,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-21 03:22:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2022-07-21 03:22:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-21 03:22:38,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:38,742 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:38,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:38,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-21 03:22:38,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2022-07-21 03:22:38,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:38,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939849368] [2022-07-21 03:22:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:38,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:38,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:38,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161668530] [2022-07-21 03:22:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:38,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:38,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:38,959 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:22:38,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 03:22:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:38,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 03:22:38,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 03:22:39,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-21 03:22:39,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939849368] [2022-07-21 03:22:39,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161668530] [2022-07-21 03:22:39,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161668530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:22:39,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:22:39,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-21 03:22:39,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826845176] [2022-07-21 03:22:39,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:22:39,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 03:22:39,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 03:22:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 03:22:39,096 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 03:22:39,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:39,291 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2022-07-21 03:22:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 03:22:39,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2022-07-21 03:22:39,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:39,294 INFO L225 Difference]: With dead ends: 279 [2022-07-21 03:22:39,294 INFO L226 Difference]: Without dead ends: 259 [2022-07-21 03:22:39,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-07-21 03:22:39,296 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 62 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:39,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 334 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:22:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-07-21 03:22:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2022-07-21 03:22:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-21 03:22:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2022-07-21 03:22:39,328 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2022-07-21 03:22:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:39,329 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2022-07-21 03:22:39,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 03:22:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2022-07-21 03:22:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 03:22:39,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:39,331 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:39,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:39,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 03:22:39,543 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2022-07-21 03:22:39,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:39,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627036369] [2022-07-21 03:22:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:39,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:39,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938285373] [2022-07-21 03:22:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:39,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:39,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:39,552 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:22:39,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 03:22:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:39,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 03:22:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 03:22:39,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-21 03:22:39,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627036369] [2022-07-21 03:22:39,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938285373] [2022-07-21 03:22:39,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938285373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:22:39,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:22:39,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-21 03:22:39,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606692482] [2022-07-21 03:22:39,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:22:39,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 03:22:39,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:39,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 03:22:39,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 03:22:39,695 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-21 03:22:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:39,805 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2022-07-21 03:22:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 03:22:39,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2022-07-21 03:22:39,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:39,807 INFO L225 Difference]: With dead ends: 344 [2022-07-21 03:22:39,807 INFO L226 Difference]: Without dead ends: 248 [2022-07-21 03:22:39,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:22:39,808 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 77 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:39,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 188 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:22:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-07-21 03:22:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2022-07-21 03:22:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-07-21 03:22:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2022-07-21 03:22:39,830 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2022-07-21 03:22:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:39,831 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2022-07-21 03:22:39,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-21 03:22:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2022-07-21 03:22:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 03:22:39,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:39,831 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:39,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:40,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 03:22:40,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2022-07-21 03:22:40,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:40,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701163715] [2022-07-21 03:22:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:40,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:40,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:40,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461516554] [2022-07-21 03:22:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:40,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:40,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:40,055 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:22:40,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 03:22:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:22:40,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 03:22:40,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 03:22:40,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-21 03:22:40,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:40,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701163715] [2022-07-21 03:22:40,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:40,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461516554] [2022-07-21 03:22:40,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461516554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:22:40,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:22:40,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-07-21 03:22:40,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662306589] [2022-07-21 03:22:40,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:22:40,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 03:22:40,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:40,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 03:22:40,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-21 03:22:40,287 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-21 03:22:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:40,596 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2022-07-21 03:22:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 03:22:40,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2022-07-21 03:22:40,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:40,599 INFO L225 Difference]: With dead ends: 330 [2022-07-21 03:22:40,599 INFO L226 Difference]: Without dead ends: 324 [2022-07-21 03:22:40,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-21 03:22:40,600 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 40 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:40,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 286 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 03:22:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-21 03:22:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2022-07-21 03:22:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-07-21 03:22:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2022-07-21 03:22:40,618 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2022-07-21 03:22:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:40,619 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2022-07-21 03:22:40,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-21 03:22:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2022-07-21 03:22:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-21 03:22:40,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:40,619 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:40,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:40,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 03:22:40,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:40,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2022-07-21 03:22:40,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:40,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702352464] [2022-07-21 03:22:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:40,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:40,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:40,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506016137] [2022-07-21 03:22:40,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:22:40,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:40,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:40,853 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:22:40,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 03:22:40,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:22:40,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:22:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 03:22:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-21 03:22:41,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702352464] [2022-07-21 03:22:41,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506016137] [2022-07-21 03:22:41,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506016137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 03:22:41,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:22:41,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-21 03:22:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491444602] [2022-07-21 03:22:41,384 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 03:22:41,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 03:22:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 03:22:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-21 03:22:41,385 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 03:22:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:22:41,744 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2022-07-21 03:22:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 03:22:41,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2022-07-21 03:22:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:22:41,746 INFO L225 Difference]: With dead ends: 315 [2022-07-21 03:22:41,746 INFO L226 Difference]: Without dead ends: 313 [2022-07-21 03:22:41,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-21 03:22:41,746 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 03:22:41,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 245 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 03:22:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-07-21 03:22:41,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2022-07-21 03:22:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-07-21 03:22:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2022-07-21 03:22:41,764 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2022-07-21 03:22:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:22:41,764 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2022-07-21 03:22:41,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 03:22:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2022-07-21 03:22:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 03:22:41,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:22:41,765 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:22:41,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 03:22:41,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 03:22:41,982 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:22:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:22:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2022-07-21 03:22:41,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:22:41,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496479040] [2022-07-21 03:22:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:22:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:22:41,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:22:41,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500127170] [2022-07-21 03:22:41,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 03:22:41,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:22:41,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:22:41,990 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:22:41,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 03:22:42,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 03:22:42,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:22:42,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 03:22:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:22:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-21 03:22:42,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:22:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-21 03:22:43,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:22:43,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496479040] [2022-07-21 03:22:43,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:22:43,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500127170] [2022-07-21 03:22:43,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500127170] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:22:43,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:22:43,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-07-21 03:22:43,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62295372] [2022-07-21 03:22:43,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:22:43,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 03:22:43,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:22:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 03:22:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-07-21 03:22:43,829 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-21 03:22:45,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:22:47,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:23:00,239 WARN L233 SmtUtils]: Spent 9.99s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 03:23:09,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 03:23:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:23:10,175 INFO L93 Difference]: Finished difference Result 427 states and 568 transitions. [2022-07-21 03:23:10,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 03:23:10,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2022-07-21 03:23:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:23:10,177 INFO L225 Difference]: With dead ends: 427 [2022-07-21 03:23:10,177 INFO L226 Difference]: Without dead ends: 423 [2022-07-21 03:23:10,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=289, Invalid=971, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 03:23:10,178 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 183 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 163 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-07-21 03:23:10,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 256 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 731 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-07-21 03:23:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-21 03:23:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 388. [2022-07-21 03:23:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 254 states have (on average 1.2283464566929134) internal successors, (312), 264 states have internal predecessors, (312), 101 states have call successors, (101), 33 states have call predecessors, (101), 32 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-07-21 03:23:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 510 transitions. [2022-07-21 03:23:10,215 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 510 transitions. Word has length 74 [2022-07-21 03:23:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:23:10,215 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 510 transitions. [2022-07-21 03:23:10,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2022-07-21 03:23:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 510 transitions. [2022-07-21 03:23:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 03:23:10,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:23:10,216 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:23:10,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 03:23:10,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 03:23:10,417 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:23:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:23:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2022-07-21 03:23:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:23:10,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784418844] [2022-07-21 03:23:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:23:10,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:23:10,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769380815] [2022-07-21 03:23:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:10,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:10,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:23:10,425 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:23:10,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 03:23:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:23:10,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 03:23:10,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:23:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-21 03:23:10,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:23:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-21 03:23:11,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:23:11,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784418844] [2022-07-21 03:23:11,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:23:11,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769380815] [2022-07-21 03:23:11,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769380815] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:23:11,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:23:11,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-21 03:23:11,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640155516] [2022-07-21 03:23:11,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:23:11,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 03:23:11,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:23:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 03:23:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-21 03:23:11,221 INFO L87 Difference]: Start difference. First operand 388 states and 510 transitions. Second operand has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 03:23:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:23:13,559 INFO L93 Difference]: Finished difference Result 450 states and 597 transitions. [2022-07-21 03:23:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 03:23:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 80 [2022-07-21 03:23:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:23:13,561 INFO L225 Difference]: With dead ends: 450 [2022-07-21 03:23:13,561 INFO L226 Difference]: Without dead ends: 439 [2022-07-21 03:23:13,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 03:23:13,562 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 94 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 03:23:13,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 388 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-21 03:23:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-07-21 03:23:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 429. [2022-07-21 03:23:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 284 states have (on average 1.2288732394366197) internal successors, (349), 292 states have internal predecessors, (349), 111 states have call successors, (111), 33 states have call predecessors, (111), 33 states have return successors, (109), 103 states have call predecessors, (109), 109 states have call successors, (109) [2022-07-21 03:23:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 569 transitions. [2022-07-21 03:23:13,619 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 569 transitions. Word has length 80 [2022-07-21 03:23:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:23:13,619 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 569 transitions. [2022-07-21 03:23:13,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 03:23:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 569 transitions. [2022-07-21 03:23:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-21 03:23:13,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:23:13,620 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:23:13,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 03:23:13,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:13,835 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:23:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:23:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2022-07-21 03:23:13,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:23:13,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036755014] [2022-07-21 03:23:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:13,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:23:13,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:23:13,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284727522] [2022-07-21 03:23:13,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 03:23:13,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:23:13,845 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:23:13,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 03:23:13,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 03:23:13,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:23:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 03:23:13,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:23:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-21 03:23:13,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 03:23:13,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:23:13,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036755014] [2022-07-21 03:23:13,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:23:13,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284727522] [2022-07-21 03:23:13,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284727522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 03:23:13,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 03:23:13,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 03:23:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165721509] [2022-07-21 03:23:13,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 03:23:13,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 03:23:13,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:23:13,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 03:23:13,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 03:23:13,914 INFO L87 Difference]: Start difference. First operand 429 states and 569 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-21 03:23:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:23:14,035 INFO L93 Difference]: Finished difference Result 656 states and 926 transitions. [2022-07-21 03:23:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 03:23:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2022-07-21 03:23:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:23:14,038 INFO L225 Difference]: With dead ends: 656 [2022-07-21 03:23:14,038 INFO L226 Difference]: Without dead ends: 491 [2022-07-21 03:23:14,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 03:23:14,039 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:23:14,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 163 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:23:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-21 03:23:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 456. [2022-07-21 03:23:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 301 states have (on average 1.2425249169435215) internal successors, (374), 309 states have internal predecessors, (374), 121 states have call successors, (121), 33 states have call predecessors, (121), 33 states have return successors, (119), 113 states have call predecessors, (119), 119 states have call successors, (119) [2022-07-21 03:23:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 614 transitions. [2022-07-21 03:23:14,100 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 614 transitions. Word has length 96 [2022-07-21 03:23:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:23:14,100 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 614 transitions. [2022-07-21 03:23:14,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-21 03:23:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 614 transitions. [2022-07-21 03:23:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 03:23:14,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:23:14,102 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:23:14,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 03:23:14,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 03:23:14,316 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:23:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:23:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2022-07-21 03:23:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:23:14,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616766454] [2022-07-21 03:23:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:23:14,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:23:14,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22084771] [2022-07-21 03:23:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:14,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:14,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:23:14,340 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:23:14,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 03:23:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:23:14,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 03:23:14,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:23:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-21 03:23:14,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:23:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-07-21 03:23:14,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:23:14,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616766454] [2022-07-21 03:23:14,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:23:14,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22084771] [2022-07-21 03:23:14,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22084771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:23:14,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:23:14,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-07-21 03:23:14,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398777712] [2022-07-21 03:23:14,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:23:14,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 03:23:14,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:23:14,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 03:23:14,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:23:14,608 INFO L87 Difference]: Start difference. First operand 456 states and 614 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-07-21 03:23:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:23:14,879 INFO L93 Difference]: Finished difference Result 1062 states and 1468 transitions. [2022-07-21 03:23:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 03:23:14,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) Word has length 112 [2022-07-21 03:23:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:23:14,882 INFO L225 Difference]: With dead ends: 1062 [2022-07-21 03:23:14,882 INFO L226 Difference]: Without dead ends: 849 [2022-07-21 03:23:14,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-07-21 03:23:14,884 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 134 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 03:23:14,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 348 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 03:23:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-07-21 03:23:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 833. [2022-07-21 03:23:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 535 states have (on average 1.2018691588785047) internal successors, (643), 548 states have internal predecessors, (643), 228 states have call successors, (228), 69 states have call predecessors, (228), 69 states have return successors, (223), 215 states have call predecessors, (223), 223 states have call successors, (223) [2022-07-21 03:23:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1094 transitions. [2022-07-21 03:23:15,005 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1094 transitions. Word has length 112 [2022-07-21 03:23:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:23:15,005 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1094 transitions. [2022-07-21 03:23:15,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-07-21 03:23:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1094 transitions. [2022-07-21 03:23:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-21 03:23:15,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:23:15,006 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:23:15,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 03:23:15,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 03:23:15,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:23:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:23:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 1 times [2022-07-21 03:23:15,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:23:15,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740919943] [2022-07-21 03:23:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:23:15,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:23:15,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810902376] [2022-07-21 03:23:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:15,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:15,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:23:15,227 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:23:15,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 03:23:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:23:15,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 03:23:15,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:23:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 99 proven. 88 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-07-21 03:23:15,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:23:19,757 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (.cse0 (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))))) (.cse2 (+ (* (- 1) |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|)) (.cse3 (= |c_ULTIMATE.start_main_~p~0#1| 0))) (and (let ((.cse1 (div .cse4 |c_ULTIMATE.start_main_~p~0#1|))) (or (= |c_ULTIMATE.start_main_~c~0#1| (+ .cse0 (* .cse1 .cse2))) (not (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* .cse1 |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~b~0#1|)) .cse3 (not (= (mod .cse4 |c_ULTIMATE.start_main_~p~0#1|) 0)))) (or (not (= .cse4 0)) (let ((.cse6 (= 0 |c_ULTIMATE.start_main_~q~0#1|)) (.cse5 (+ |c_ULTIMATE.start_main_~b~0#1| (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)))) (and (or (not (= .cse5 0)) (forall ((|ULTIMATE.start_main_~x~0#1| Int)) (= |c_ULTIMATE.start_main_~c~0#1| (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (* (+ (* (- 1) |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~x~0#1|)))) (not .cse6)) (or .cse6 (not (= (mod .cse5 |c_ULTIMATE.start_main_~q~0#1|) 0)) (= |c_ULTIMATE.start_main_~c~0#1| (+ .cse0 (* .cse2 (div .cse5 |c_ULTIMATE.start_main_~q~0#1|))))))) (not .cse3)))) is different from true [2022-07-21 03:23:19,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:23:19,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740919943] [2022-07-21 03:23:19,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:23:19,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810902376] [2022-07-21 03:23:19,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810902376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 03:23:19,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:23:19,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-21 03:23:19,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301483573] [2022-07-21 03:23:19,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 03:23:19,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 03:23:19,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:23:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 03:23:19,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=251, Unknown=1, NotChecked=32, Total=342 [2022-07-21 03:23:19,761 INFO L87 Difference]: Start difference. First operand 833 states and 1094 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-21 03:23:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:23:20,522 INFO L93 Difference]: Finished difference Result 878 states and 1150 transitions. [2022-07-21 03:23:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 03:23:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 115 [2022-07-21 03:23:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:23:20,526 INFO L225 Difference]: With dead ends: 878 [2022-07-21 03:23:20,526 INFO L226 Difference]: Without dead ends: 876 [2022-07-21 03:23:20,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=81, Invalid=342, Unknown=1, NotChecked=38, Total=462 [2022-07-21 03:23:20,527 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 28 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 03:23:20,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 370 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 03:23:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-07-21 03:23:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 872. [2022-07-21 03:23:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 558 states have (on average 1.1989247311827957) internal successors, (669), 571 states have internal predecessors, (669), 240 states have call successors, (240), 73 states have call predecessors, (240), 73 states have return successors, (235), 227 states have call predecessors, (235), 235 states have call successors, (235) [2022-07-21 03:23:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1144 transitions. [2022-07-21 03:23:20,659 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1144 transitions. Word has length 115 [2022-07-21 03:23:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:23:20,659 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 1144 transitions. [2022-07-21 03:23:20,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-21 03:23:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1144 transitions. [2022-07-21 03:23:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-21 03:23:20,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:23:20,661 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:23:20,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 03:23:20,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 03:23:20,876 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:23:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:23:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 2 times [2022-07-21 03:23:20,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:23:20,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343880703] [2022-07-21 03:23:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:20,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:23:20,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:23:20,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971472387] [2022-07-21 03:23:20,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:23:20,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:20,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:23:20,887 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:23:20,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 03:23:20,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:23:20,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:23:20,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-21 03:23:20,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:23:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 106 proven. 112 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-07-21 03:23:21,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:23:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 134 proven. 23 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-07-21 03:23:21,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:23:21,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343880703] [2022-07-21 03:23:21,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:23:21,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971472387] [2022-07-21 03:23:21,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971472387] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:23:21,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:23:21,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-07-21 03:23:21,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516312306] [2022-07-21 03:23:21,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:23:21,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 03:23:21,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:23:21,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 03:23:21,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-21 03:23:21,902 INFO L87 Difference]: Start difference. First operand 872 states and 1144 transitions. Second operand has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-21 03:23:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:23:23,917 INFO L93 Difference]: Finished difference Result 965 states and 1235 transitions. [2022-07-21 03:23:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 03:23:23,917 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) Word has length 119 [2022-07-21 03:23:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:23:23,920 INFO L225 Difference]: With dead ends: 965 [2022-07-21 03:23:23,920 INFO L226 Difference]: Without dead ends: 961 [2022-07-21 03:23:23,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 219 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-07-21 03:23:23,921 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 99 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 03:23:23,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 327 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-21 03:23:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-07-21 03:23:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 955. [2022-07-21 03:23:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 616 states have (on average 1.1834415584415585) internal successors, (729), 628 states have internal predecessors, (729), 249 states have call successors, (249), 90 states have call predecessors, (249), 89 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-07-21 03:23:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1222 transitions. [2022-07-21 03:23:24,062 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1222 transitions. Word has length 119 [2022-07-21 03:23:24,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:23:24,062 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1222 transitions. [2022-07-21 03:23:24,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-21 03:23:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1222 transitions. [2022-07-21 03:23:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-21 03:23:24,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:23:24,064 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:23:24,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 03:23:24,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:24,283 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:23:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:23:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2022-07-21 03:23:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:23:24,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108792366] [2022-07-21 03:23:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:23:24,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:23:24,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004079662] [2022-07-21 03:23:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:24,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:23:24,296 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:23:24,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 03:23:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 03:23:24,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 03:23:24,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:23:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-21 03:23:24,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:23:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-07-21 03:23:24,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:23:24,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108792366] [2022-07-21 03:23:24,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:23:24,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004079662] [2022-07-21 03:23:24,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004079662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:23:24,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:23:24,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-07-21 03:23:24,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328113912] [2022-07-21 03:23:24,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:23:24,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 03:23:24,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:23:24,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 03:23:24,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-21 03:23:24,606 INFO L87 Difference]: Start difference. First operand 955 states and 1222 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-07-21 03:23:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:23:24,956 INFO L93 Difference]: Finished difference Result 993 states and 1260 transitions. [2022-07-21 03:23:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 03:23:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 129 [2022-07-21 03:23:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:23:24,960 INFO L225 Difference]: With dead ends: 993 [2022-07-21 03:23:24,960 INFO L226 Difference]: Without dead ends: 973 [2022-07-21 03:23:24,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-07-21 03:23:24,961 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 03:23:24,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 316 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 03:23:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-07-21 03:23:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 967. [2022-07-21 03:23:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 628 states have (on average 1.164012738853503) internal successors, (731), 640 states have internal predecessors, (731), 249 states have call successors, (249), 90 states have call predecessors, (249), 89 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-07-21 03:23:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1224 transitions. [2022-07-21 03:23:25,095 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1224 transitions. Word has length 129 [2022-07-21 03:23:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:23:25,096 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1224 transitions. [2022-07-21 03:23:25,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-07-21 03:23:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1224 transitions. [2022-07-21 03:23:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-21 03:23:25,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:23:25,097 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:23:25,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 03:23:25,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:25,315 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:23:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:23:25,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2022-07-21 03:23:25,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:23:25,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445430504] [2022-07-21 03:23:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:25,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:23:25,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:23:25,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226178449] [2022-07-21 03:23:25,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 03:23:25,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:25,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:23:25,322 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:23:25,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 03:23:25,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 03:23:25,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:23:25,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-21 03:23:25,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:23:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 147 proven. 111 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-07-21 03:23:27,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:23:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-21 03:23:29,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:23:29,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445430504] [2022-07-21 03:23:29,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:23:29,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226178449] [2022-07-21 03:23:29,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226178449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 03:23:29,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 03:23:29,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 30 [2022-07-21 03:23:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998889951] [2022-07-21 03:23:29,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 03:23:29,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 03:23:29,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:23:29,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 03:23:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-07-21 03:23:29,367 INFO L87 Difference]: Start difference. First operand 967 states and 1224 transitions. Second operand has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-21 03:23:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:23:49,128 INFO L93 Difference]: Finished difference Result 1023 states and 1285 transitions. [2022-07-21 03:23:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 03:23:49,129 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) Word has length 130 [2022-07-21 03:23:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:23:49,132 INFO L225 Difference]: With dead ends: 1023 [2022-07-21 03:23:49,132 INFO L226 Difference]: Without dead ends: 1003 [2022-07-21 03:23:49,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=524, Invalid=2556, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 03:23:49,133 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 137 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-07-21 03:23:49,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 656 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-07-21 03:23:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-07-21 03:23:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 888. [2022-07-21 03:23:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 575 states have (on average 1.1478260869565218) internal successors, (660), 586 states have internal predecessors, (660), 222 states have call successors, (222), 90 states have call predecessors, (222), 90 states have return successors, (220), 211 states have call predecessors, (220), 220 states have call successors, (220) [2022-07-21 03:23:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1102 transitions. [2022-07-21 03:23:49,264 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1102 transitions. Word has length 130 [2022-07-21 03:23:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:23:49,265 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1102 transitions. [2022-07-21 03:23:49,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 15 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-21 03:23:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1102 transitions. [2022-07-21 03:23:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-21 03:23:49,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:23:49,266 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:23:49,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 03:23:49,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 03:23:49,468 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:23:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:23:49,468 INFO L85 PathProgramCache]: Analyzing trace with hash 724097753, now seen corresponding path program 3 times [2022-07-21 03:23:49,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:23:49,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232329214] [2022-07-21 03:23:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:23:49,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:23:49,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:23:49,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677351726] [2022-07-21 03:23:49,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 03:23:49,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:23:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:23:49,480 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:23:49,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 03:23:49,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 03:23:49,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:23:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-21 03:23:49,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:24:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 132 proven. 86 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2022-07-21 03:24:02,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:24:48,052 WARN L855 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (let ((.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse13 (* |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse12 (* (- 1) |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (or (<= (+ |c_ULTIMATE.start_main_~b~0#1| (* 2 .cse0) (* 2 .cse1)) (+ (* .cse2 2) (* 2 .cse3) (* .cse4 2) (* 2 .cse5))) (<= (+ .cse2 .cse4 .cse5 .cse3) (+ .cse0 .cse1)) (not (let ((.cse6 (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse8 (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse11 (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse7 (+ |c_ULTIMATE.start_main_~r~0#1| (* (- 1) .cse13))) (.cse9 (+ .cse12 |c_ULTIMATE.start_main_~p~0#1|))) (= (+ .cse6 (* |c_ULTIMATE.start_main_~yy~0#1| .cse7) .cse8 (* |c_ULTIMATE.start_main_~xy~0#1| .cse9) .cse0 .cse1 .cse10 |c_ULTIMATE.start_main_~b~0#1| .cse11) (+ (* |c_ULTIMATE.start_main_~y~0#1| (+ .cse6 .cse8 .cse0 .cse1 .cse10 |c_ULTIMATE.start_main_~b~0#1| .cse11)) (* |c_ULTIMATE.start_main_~y~0#1| .cse7) (* |c_ULTIMATE.start_main_~x~0#1| .cse9))))) (let ((.cse17 (+ (* (- 1) |c_ULTIMATE.start_main_~p~0#1|) (* (- 1) .cse12) |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (+ .cse13 |c_ULTIMATE.start_main_~s~0#1| (* (- 1) |c_ULTIMATE.start_main_~r~0#1|)))) (let ((.cse14 (* |c_ULTIMATE.start_main_~y~0#1| .cse16)) (.cse15 (* |c_ULTIMATE.start_main_~x~0#1| .cse17))) (= (+ .cse14 .cse15 (* .cse16 |c_ULTIMATE.start_main_~yy~0#1|) (* |c_ULTIMATE.start_main_~xy~0#1| .cse17)) (+ .cse14 .cse15 (* |c_ULTIMATE.start_main_~y~0#1| (+ .cse14 .cse15))))))))) is different from true [2022-07-21 03:25:00,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 03:25:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232329214] [2022-07-21 03:25:00,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 03:25:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677351726] [2022-07-21 03:25:00,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677351726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 03:25:00,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 03:25:00,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-21 03:25:00,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568022801] [2022-07-21 03:25:00,359 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 03:25:00,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 03:25:00,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 03:25:00,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 03:25:00,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=557, Unknown=10, NotChecked=50, Total=756 [2022-07-21 03:25:00,360 INFO L87 Difference]: Start difference. First operand 888 states and 1102 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-21 03:25:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 03:25:16,493 INFO L93 Difference]: Finished difference Result 1115 states and 1357 transitions. [2022-07-21 03:25:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 03:25:16,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 147 [2022-07-21 03:25:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 03:25:16,499 INFO L225 Difference]: With dead ends: 1115 [2022-07-21 03:25:16,499 INFO L226 Difference]: Without dead ends: 1113 [2022-07-21 03:25:16,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=212, Invalid=902, Unknown=12, NotChecked=64, Total=1190 [2022-07-21 03:25:16,500 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 59 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-07-21 03:25:16,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 468 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-07-21 03:25:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-07-21 03:25:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1100. [2022-07-21 03:25:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 721 states have (on average 1.1345353675450762) internal successors, (818), 731 states have internal predecessors, (818), 262 states have call successors, (262), 116 states have call predecessors, (262), 116 states have return successors, (260), 252 states have call predecessors, (260), 260 states have call successors, (260) [2022-07-21 03:25:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1340 transitions. [2022-07-21 03:25:16,672 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1340 transitions. Word has length 147 [2022-07-21 03:25:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 03:25:16,673 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1340 transitions. [2022-07-21 03:25:16,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-21 03:25:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1340 transitions. [2022-07-21 03:25:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-07-21 03:25:16,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 03:25:16,675 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 03:25:16,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 03:25:16,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 03:25:16,880 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 03:25:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 03:25:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1547189055, now seen corresponding path program 4 times [2022-07-21 03:25:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 03:25:16,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116340374] [2022-07-21 03:25:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 03:25:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 03:25:16,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 03:25:16,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693633304] [2022-07-21 03:25:16,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 03:25:16,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 03:25:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 03:25:16,890 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 03:25:16,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 03:25:17,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 03:25:17,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 03:25:17,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-21 03:25:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 03:25:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 237 proven. 156 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2022-07-21 03:25:20,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 03:26:43,648 WARN L233 SmtUtils]: Spent 16.75s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)