./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/cohencu-ll_unwindbound100.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 c55d57654781cf0634666e1c7d4e43dff0d9410f4306aded3e4e446e1f9e88d1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:45:01,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:45:01,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:45:01,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:45:01,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:45:01,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:45:01,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:45:01,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:45:01,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:45:01,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:45:01,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:45:01,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:45:01,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:45:01,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:45:01,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:45:01,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:45:01,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:45:01,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:45:01,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:45:01,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:45:01,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:45:01,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:45:01,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:45:01,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:45:01,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:45:01,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:45:01,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:45:01,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:45:01,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:45:01,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:45:01,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:45:01,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:45:01,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:45:01,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:45:01,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:45:01,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:45:01,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:45:01,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:45:01,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:45:01,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:45:01,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:45:01,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:45:01,524 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:45:01,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:45:01,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:45:01,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:45:01,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:45:01,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:45:01,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:45:01,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:45:01,527 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:45:01,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:45:01,527 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:45:01,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:45:01,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:45:01,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:45:01,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:45:01,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:45:01,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:45:01,528 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:45:01,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:45:01,529 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:45:01,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:45:01,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:45:01,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:45:01,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:45:01,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:45:01,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:45:01,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:45:01,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:45:01,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:45:01,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:45:01,530 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:45:01,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:45:01,531 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:45:01,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:45:01,531 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:45:01,531 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c55d57654781cf0634666e1c7d4e43dff0d9410f4306aded3e4e446e1f9e88d1 [2023-02-16 01:45:01,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:45:01,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:45:01,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:45:01,731 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:45:01,731 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:45:01,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2023-02-16 01:45:02,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:45:02,808 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:45:02,808 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2023-02-16 01:45:02,813 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca937f62c/d481cec93fab4ba6b930a77b1293a42c/FLAG103d5d655 [2023-02-16 01:45:02,828 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca937f62c/d481cec93fab4ba6b930a77b1293a42c [2023-02-16 01:45:02,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:45:02,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:45:02,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:45:02,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:45:02,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:45:02,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:45:02" (1/1) ... [2023-02-16 01:45:02,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213758de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:02, skipping insertion in model container [2023-02-16 01:45:02,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:45:02" (1/1) ... [2023-02-16 01:45:02,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:45:02,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:45:02,972 WARN L237 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/cohencu-ll_unwindbound100.c[588,601] [2023-02-16 01:45:02,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:45:03,004 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:45:03,017 WARN L237 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/cohencu-ll_unwindbound100.c[588,601] [2023-02-16 01:45:03,037 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:45:03,049 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:45:03,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03 WrapperNode [2023-02-16 01:45:03,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:45:03,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:45:03,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:45:03,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:45:03,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,086 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-02-16 01:45:03,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:45:03,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:45:03,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:45:03,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:45:03,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,112 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:45:03,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:45:03,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:45:03,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:45:03,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (1/1) ... [2023-02-16 01:45:03,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:45:03,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:03,138 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) [2023-02-16 01:45:03,154 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 [2023-02-16 01:45:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:45:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:45:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:45:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:45:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 01:45:03,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 01:45:03,207 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:45:03,208 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:45:03,356 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:45:03,365 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:45:03,366 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-16 01:45:03,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:45:03 BoogieIcfgContainer [2023-02-16 01:45:03,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:45:03,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:45:03,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:45:03,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:45:03,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:45:02" (1/3) ... [2023-02-16 01:45:03,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8600d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:45:03, skipping insertion in model container [2023-02-16 01:45:03,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:03" (2/3) ... [2023-02-16 01:45:03,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8600d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:45:03, skipping insertion in model container [2023-02-16 01:45:03,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:45:03" (3/3) ... [2023-02-16 01:45:03,373 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.c [2023-02-16 01:45:03,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:45:03,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:45:03,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:45:03,430 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26ccc06a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:45:03,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:45:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-16 01:45:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 01:45:03,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:03,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:03,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:03,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2023-02-16 01:45:03,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:03,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11823010] [2023-02-16 01:45:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:03,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:03,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:03,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11823010] [2023-02-16 01:45:03,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11823010] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:45:03,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:45:03,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 01:45:03,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825880355] [2023-02-16 01:45:03,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:45:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 01:45:03,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 01:45:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:45:03,628 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:03,643 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2023-02-16 01:45:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 01:45:03,645 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 01:45:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:03,649 INFO L225 Difference]: With dead ends: 50 [2023-02-16 01:45:03,649 INFO L226 Difference]: Without dead ends: 22 [2023-02-16 01:45:03,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:45:03,658 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2023-02-16 01:45:03,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:45:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-16 01:45:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-16 01:45:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 01:45:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2023-02-16 01:45:03,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2023-02-16 01:45:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:03,683 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2023-02-16 01:45:03,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2023-02-16 01:45:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 01:45:03,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:03,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:03,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 01:45:03,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:03,687 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2023-02-16 01:45:03,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:03,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781764956] [2023-02-16 01:45:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:03,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:03,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:03,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781764956] [2023-02-16 01:45:03,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781764956] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:45:03,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:45:03,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:45:03,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788351067] [2023-02-16 01:45:03,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:45:03,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:45:03,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:03,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:45:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:45:03,789 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:03,811 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2023-02-16 01:45:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:45:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 01:45:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:03,813 INFO L225 Difference]: With dead ends: 36 [2023-02-16 01:45:03,813 INFO L226 Difference]: Without dead ends: 24 [2023-02-16 01:45:03,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:45:03,814 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:03,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:45:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-16 01:45:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-16 01:45:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 01:45:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2023-02-16 01:45:03,830 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2023-02-16 01:45:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:03,830 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2023-02-16 01:45:03,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2023-02-16 01:45:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 01:45:03,830 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:03,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:03,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 01:45:03,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:03,831 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2023-02-16 01:45:03,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:03,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177197192] [2023-02-16 01:45:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:03,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:03,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:03,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177197192] [2023-02-16 01:45:03,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177197192] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:45:03,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:45:03,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 01:45:03,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998645992] [2023-02-16 01:45:03,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:45:03,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:45:03,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:03,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:45:03,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:45:03,961 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:04,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:04,012 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-02-16 01:45:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:45:04,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 01:45:04,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:04,013 INFO L225 Difference]: With dead ends: 30 [2023-02-16 01:45:04,013 INFO L226 Difference]: Without dead ends: 28 [2023-02-16 01:45:04,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:45:04,014 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:04,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:45:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-16 01:45:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-16 01:45:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 01:45:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-02-16 01:45:04,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2023-02-16 01:45:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:04,024 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-02-16 01:45:04,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-02-16 01:45:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 01:45:04,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:04,025 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:04,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 01:45:04,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:04,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2023-02-16 01:45:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:04,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657643011] [2023-02-16 01:45:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:04,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:04,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:04,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153453149] [2023-02-16 01:45:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:04,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:04,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:04,038 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) [2023-02-16 01:45:04,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 01:45:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 01:45:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:04,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:04,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:04,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657643011] [2023-02-16 01:45:04,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:04,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153453149] [2023-02-16 01:45:04,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153453149] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:04,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:04,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 01:45:04,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593374139] [2023-02-16 01:45:04,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:04,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:04,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:04,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:04,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:45:04,315 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:45:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:04,583 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2023-02-16 01:45:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 01:45:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-02-16 01:45:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:04,585 INFO L225 Difference]: With dead ends: 54 [2023-02-16 01:45:04,585 INFO L226 Difference]: Without dead ends: 52 [2023-02-16 01:45:04,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:04,586 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:04,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 71 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:45:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-16 01:45:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2023-02-16 01:45:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-16 01:45:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2023-02-16 01:45:04,598 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 13 [2023-02-16 01:45:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:04,598 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2023-02-16 01:45:04,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:45:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2023-02-16 01:45:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 01:45:04,599 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:04,599 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:04,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:04,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:04,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:04,806 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2023-02-16 01:45:04,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:04,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478129031] [2023-02-16 01:45:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:04,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:04,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:04,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307119923] [2023-02-16 01:45:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:04,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:04,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:04,829 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) [2023-02-16 01:45:04,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 01:45:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:04,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 01:45:04,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:45:04,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:45:05,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478129031] [2023-02-16 01:45:05,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307119923] [2023-02-16 01:45:05,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307119923] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:05,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:05,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 01:45:05,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113434589] [2023-02-16 01:45:05,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:05,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:05,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:05,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:45:05,028 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 01:45:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:05,303 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2023-02-16 01:45:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:45:05,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-02-16 01:45:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:05,304 INFO L225 Difference]: With dead ends: 60 [2023-02-16 01:45:05,304 INFO L226 Difference]: Without dead ends: 58 [2023-02-16 01:45:05,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:05,305 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:05,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:45:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-16 01:45:05,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2023-02-16 01:45:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-16 01:45:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-02-16 01:45:05,316 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 18 [2023-02-16 01:45:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:05,317 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-02-16 01:45:05,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 01:45:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-02-16 01:45:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 01:45:05,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:05,317 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:05,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:05,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:05,522 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2023-02-16 01:45:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:05,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677441957] [2023-02-16 01:45:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:05,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:05,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891866198] [2023-02-16 01:45:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:05,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:05,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:05,535 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) [2023-02-16 01:45:05,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 01:45:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:05,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 01:45:05,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:45:05,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:45:05,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677441957] [2023-02-16 01:45:05,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891866198] [2023-02-16 01:45:05,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891866198] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:05,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:05,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 01:45:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937525031] [2023-02-16 01:45:05,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:05,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:05,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:05,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:05,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:45:05,873 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 01:45:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:07,379 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-02-16 01:45:07,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:45:07,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-02-16 01:45:07,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:07,382 INFO L225 Difference]: With dead ends: 74 [2023-02-16 01:45:07,382 INFO L226 Difference]: Without dead ends: 65 [2023-02-16 01:45:07,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:07,385 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:07,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 60 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-16 01:45:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-16 01:45:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-16 01:45:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-16 01:45:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2023-02-16 01:45:07,414 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 23 [2023-02-16 01:45:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:07,414 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2023-02-16 01:45:07,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 01:45:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2023-02-16 01:45:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 01:45:07,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:07,416 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:07,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:07,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:07,618 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:07,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2023-02-16 01:45:07,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:07,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262582055] [2023-02-16 01:45:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:07,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:07,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:07,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052996459] [2023-02-16 01:45:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:07,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:07,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:07,627 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) [2023-02-16 01:45:07,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 01:45:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:07,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 01:45:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-16 01:45:07,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-16 01:45:07,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262582055] [2023-02-16 01:45:07,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052996459] [2023-02-16 01:45:07,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052996459] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:07,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:07,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-16 01:45:07,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142496188] [2023-02-16 01:45:07,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:07,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 01:45:07,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 01:45:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:45:07,749 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 01:45:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:07,882 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2023-02-16 01:45:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 01:45:07,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2023-02-16 01:45:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:07,887 INFO L225 Difference]: With dead ends: 140 [2023-02-16 01:45:07,887 INFO L226 Difference]: Without dead ends: 119 [2023-02-16 01:45:07,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:45:07,896 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 53 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:07,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:45:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-16 01:45:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2023-02-16 01:45:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-16 01:45:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 144 transitions. [2023-02-16 01:45:07,927 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 144 transitions. Word has length 41 [2023-02-16 01:45:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:07,927 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 144 transitions. [2023-02-16 01:45:07,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 01:45:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 144 transitions. [2023-02-16 01:45:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 01:45:07,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:07,929 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:07,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:08,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:08,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:08,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 1 times [2023-02-16 01:45:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:08,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145858139] [2023-02-16 01:45:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:08,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:08,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:08,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199488757] [2023-02-16 01:45:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:08,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:08,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:08,141 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) [2023-02-16 01:45:08,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 01:45:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:08,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:45:08,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 01:45:08,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 01:45:08,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:08,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145858139] [2023-02-16 01:45:08,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:08,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199488757] [2023-02-16 01:45:08,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199488757] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:08,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:08,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-16 01:45:08,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230479034] [2023-02-16 01:45:08,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:08,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:45:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:45:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:08,390 INFO L87 Difference]: Start difference. First operand 115 states and 144 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-16 01:45:10,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:45:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:11,257 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2023-02-16 01:45:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 01:45:11,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2023-02-16 01:45:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:11,258 INFO L225 Difference]: With dead ends: 129 [2023-02-16 01:45:11,258 INFO L226 Difference]: Without dead ends: 127 [2023-02-16 01:45:11,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-16 01:45:11,259 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:11,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 98 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2023-02-16 01:45:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-16 01:45:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-02-16 01:45:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 72 states have internal predecessors, (75), 41 states have call successors, (41), 17 states have call predecessors, (41), 17 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-16 01:45:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2023-02-16 01:45:11,278 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 46 [2023-02-16 01:45:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:11,279 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2023-02-16 01:45:11,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-16 01:45:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2023-02-16 01:45:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-16 01:45:11,280 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:11,280 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:11,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:11,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:11,489 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1316290887, now seen corresponding path program 2 times [2023-02-16 01:45:11,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:11,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447975454] [2023-02-16 01:45:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:11,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:11,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:11,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536427610] [2023-02-16 01:45:11,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:45:11,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:11,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:11,497 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) [2023-02-16 01:45:11,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 01:45:11,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:45:11,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:45:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-16 01:45:11,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-16 01:45:11,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:11,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447975454] [2023-02-16 01:45:11,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:11,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536427610] [2023-02-16 01:45:11,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536427610] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:11,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:11,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 01:45:11,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8725204] [2023-02-16 01:45:11,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:11,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:11,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:45:11,805 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-16 01:45:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:12,475 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2023-02-16 01:45:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 01:45:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 56 [2023-02-16 01:45:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:12,477 INFO L225 Difference]: With dead ends: 141 [2023-02-16 01:45:12,477 INFO L226 Difference]: Without dead ends: 135 [2023-02-16 01:45:12,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:12,478 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:12,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 94 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 01:45:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-16 01:45:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-02-16 01:45:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 81 states have internal predecessors, (84), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-16 01:45:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2023-02-16 01:45:12,495 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 56 [2023-02-16 01:45:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:12,496 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2023-02-16 01:45:12,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-16 01:45:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2023-02-16 01:45:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-16 01:45:12,497 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:12,497 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:12,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:12,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:12,702 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:12,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:12,702 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2023-02-16 01:45:12,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:12,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343673714] [2023-02-16 01:45:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:12,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:12,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:12,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990128871] [2023-02-16 01:45:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:12,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:12,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:12,710 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) [2023-02-16 01:45:12,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 01:45:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:12,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 01:45:12,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-16 01:45:13,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-16 01:45:13,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:13,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343673714] [2023-02-16 01:45:13,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:13,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990128871] [2023-02-16 01:45:13,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990128871] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:13,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:13,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-16 01:45:13,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538593550] [2023-02-16 01:45:13,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:13,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:45:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:45:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:13,378 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-16 01:45:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:13,850 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2023-02-16 01:45:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 01:45:13,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 67 [2023-02-16 01:45:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:13,851 INFO L225 Difference]: With dead ends: 149 [2023-02-16 01:45:13,851 INFO L226 Difference]: Without dead ends: 145 [2023-02-16 01:45:13,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:45:13,852 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:13,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 84 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:45:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-16 01:45:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-02-16 01:45:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 88 states have internal predecessors, (91), 37 states have call successors, (37), 23 states have call predecessors, (37), 22 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-16 01:45:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2023-02-16 01:45:13,883 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 67 [2023-02-16 01:45:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:13,884 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2023-02-16 01:45:13,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-16 01:45:13,884 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2023-02-16 01:45:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-16 01:45:13,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:13,888 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:13,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:14,095 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times [2023-02-16 01:45:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:14,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724680080] [2023-02-16 01:45:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:14,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:14,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712550402] [2023-02-16 01:45:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:14,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:14,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:14,103 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) [2023-02-16 01:45:14,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 01:45:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 01:45:14,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-16 01:45:14,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-16 01:45:14,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:14,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724680080] [2023-02-16 01:45:14,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:14,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712550402] [2023-02-16 01:45:14,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712550402] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:14,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:14,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-16 01:45:14,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091844713] [2023-02-16 01:45:14,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:14,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 01:45:14,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 01:45:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:45:14,686 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-02-16 01:45:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:15,638 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2023-02-16 01:45:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 01:45:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 72 [2023-02-16 01:45:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:15,640 INFO L225 Difference]: With dead ends: 164 [2023-02-16 01:45:15,640 INFO L226 Difference]: Without dead ends: 153 [2023-02-16 01:45:15,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-02-16 01:45:15,641 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:15,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 101 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 01:45:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-16 01:45:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-02-16 01:45:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 91 states have internal predecessors, (93), 42 states have call successors, (42), 23 states have call predecessors, (42), 23 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-16 01:45:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2023-02-16 01:45:15,667 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 72 [2023-02-16 01:45:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:15,667 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2023-02-16 01:45:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-02-16 01:45:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2023-02-16 01:45:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-16 01:45:15,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:15,668 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-02-16 01:45:15,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:15,873 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,SelfDestructingSolverStorable10 [2023-02-16 01:45:15,875 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:15,876 INFO L85 PathProgramCache]: Analyzing trace with hash 514910066, now seen corresponding path program 3 times [2023-02-16 01:45:15,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:15,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170620974] [2023-02-16 01:45:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:15,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:15,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473077324] [2023-02-16 01:45:15,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:45:15,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:15,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:15,886 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) [2023-02-16 01:45:15,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 01:45:15,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 01:45:15,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:15,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 01:45:15,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 01:45:16,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 01:45:17,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170620974] [2023-02-16 01:45:17,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473077324] [2023-02-16 01:45:17,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473077324] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:17,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:17,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-16 01:45:17,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324040089] [2023-02-16 01:45:17,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:17,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 01:45:17,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 01:45:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:45:17,059 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-16 01:45:20,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:45:23,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:45:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:23,793 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2023-02-16 01:45:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 01:45:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 79 [2023-02-16 01:45:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:23,795 INFO L225 Difference]: With dead ends: 159 [2023-02-16 01:45:23,795 INFO L226 Difference]: Without dead ends: 143 [2023-02-16 01:45:23,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:45:23,796 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:23,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 423 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2023-02-16 01:45:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-16 01:45:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2023-02-16 01:45:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 87 states have internal predecessors, (88), 34 states have call successors, (34), 22 states have call predecessors, (34), 22 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-16 01:45:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2023-02-16 01:45:23,822 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 79 [2023-02-16 01:45:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:23,822 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2023-02-16 01:45:23,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-16 01:45:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2023-02-16 01:45:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-16 01:45:23,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:23,823 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:23,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:24,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:24,028 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:24,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2023-02-16 01:45:24,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:24,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179191518] [2023-02-16 01:45:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:24,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:24,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:24,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366788042] [2023-02-16 01:45:24,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:45:24,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:24,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:24,037 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) [2023-02-16 01:45:24,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 01:45:24,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:45:24,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:24,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 01:45:24,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-16 01:45:24,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-02-16 01:45:24,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:24,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179191518] [2023-02-16 01:45:24,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:24,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366788042] [2023-02-16 01:45:24,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366788042] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:24,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:24,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-16 01:45:24,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905704824] [2023-02-16 01:45:24,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:24,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:45:24,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:45:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:24,332 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-02-16 01:45:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:24,674 INFO L93 Difference]: Finished difference Result 398 states and 422 transitions. [2023-02-16 01:45:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 01:45:24,674 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 125 [2023-02-16 01:45:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:24,676 INFO L225 Difference]: With dead ends: 398 [2023-02-16 01:45:24,676 INFO L226 Difference]: Without dead ends: 382 [2023-02-16 01:45:24,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-16 01:45:24,678 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 143 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:24,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 357 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:45:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-02-16 01:45:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 326. [2023-02-16 01:45:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 202 states have (on average 1.0495049504950495) internal successors, (212), 209 states have internal predecessors, (212), 68 states have call successors, (68), 56 states have call predecessors, (68), 55 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-02-16 01:45:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 345 transitions. [2023-02-16 01:45:24,740 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 345 transitions. Word has length 125 [2023-02-16 01:45:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:24,740 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 345 transitions. [2023-02-16 01:45:24,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-02-16 01:45:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 345 transitions. [2023-02-16 01:45:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-16 01:45:24,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:24,742 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:24,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:24,947 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,SelfDestructingSolverStorable12 [2023-02-16 01:45:24,947 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash 36255119, now seen corresponding path program 1 times [2023-02-16 01:45:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:24,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102361784] [2023-02-16 01:45:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:24,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:24,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:24,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921867284] [2023-02-16 01:45:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:24,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:24,969 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) [2023-02-16 01:45:24,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 01:45:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:25,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-16 01:45:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-02-16 01:45:25,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:28,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102361784] [2023-02-16 01:45:28,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:28,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921867284] [2023-02-16 01:45:28,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921867284] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:45:28,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 01:45:28,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-16 01:45:28,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557377495] [2023-02-16 01:45:28,201 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:28,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:28,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2023-02-16 01:45:28,202 INFO L87 Difference]: Start difference. First operand 326 states and 345 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-16 01:45:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:28,632 INFO L93 Difference]: Finished difference Result 328 states and 346 transitions. [2023-02-16 01:45:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 01:45:28,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 133 [2023-02-16 01:45:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:28,634 INFO L225 Difference]: With dead ends: 328 [2023-02-16 01:45:28,634 INFO L226 Difference]: Without dead ends: 312 [2023-02-16 01:45:28,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=91, Invalid=328, Unknown=1, NotChecked=0, Total=420 [2023-02-16 01:45:28,635 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:28,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 149 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:45:28,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-02-16 01:45:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2023-02-16 01:45:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 194 states have (on average 1.0463917525773196) internal successors, (203), 201 states have internal predecessors, (203), 64 states have call successors, (64), 53 states have call predecessors, (64), 53 states have return successors, (62), 57 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-16 01:45:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 329 transitions. [2023-02-16 01:45:28,691 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 329 transitions. Word has length 133 [2023-02-16 01:45:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:28,691 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 329 transitions. [2023-02-16 01:45:28,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-16 01:45:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 329 transitions. [2023-02-16 01:45:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-16 01:45:28,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:28,692 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:28,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:28,897 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,SelfDestructingSolverStorable13 [2023-02-16 01:45:28,897 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1972302768, now seen corresponding path program 2 times [2023-02-16 01:45:28,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:28,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364340212] [2023-02-16 01:45:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:28,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:28,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858618156] [2023-02-16 01:45:28,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:45:28,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:28,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:28,905 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) [2023-02-16 01:45:28,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 01:45:28,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:45:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-16 01:45:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 128 proven. 84 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2023-02-16 01:45:29,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:30,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364340212] [2023-02-16 01:45:30,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858618156] [2023-02-16 01:45:30,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858618156] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:45:30,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 01:45:30,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-16 01:45:30,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094157773] [2023-02-16 01:45:30,038 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:30,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 01:45:30,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:30,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 01:45:30,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-02-16 01:45:30,040 INFO L87 Difference]: Start difference. First operand 312 states and 329 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 6 states have call predecessors, (27), 7 states have call successors, (27) [2023-02-16 01:45:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:30,619 INFO L93 Difference]: Finished difference Result 325 states and 342 transitions. [2023-02-16 01:45:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 01:45:30,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 6 states have call predecessors, (27), 7 states have call successors, (27) Word has length 156 [2023-02-16 01:45:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:30,621 INFO L225 Difference]: With dead ends: 325 [2023-02-16 01:45:30,621 INFO L226 Difference]: Without dead ends: 323 [2023-02-16 01:45:30,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-02-16 01:45:30,622 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:30,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 175 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:45:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-16 01:45:30,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2023-02-16 01:45:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 200 states have (on average 1.045) internal successors, (209), 207 states have internal predecessors, (209), 66 states have call successors, (66), 55 states have call predecessors, (66), 55 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2023-02-16 01:45:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 339 transitions. [2023-02-16 01:45:30,673 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 339 transitions. Word has length 156 [2023-02-16 01:45:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:30,674 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 339 transitions. [2023-02-16 01:45:30,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 6 states have call predecessors, (27), 7 states have call successors, (27) [2023-02-16 01:45:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 339 transitions. [2023-02-16 01:45:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-02-16 01:45:30,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:30,675 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:30,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:30,880 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,SelfDestructingSolverStorable14 [2023-02-16 01:45:30,880 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:30,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1802004917, now seen corresponding path program 2 times [2023-02-16 01:45:30,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:30,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348010005] [2023-02-16 01:45:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:30,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:30,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:30,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989198207] [2023-02-16 01:45:30,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:45:30,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:30,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:30,889 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) [2023-02-16 01:45:30,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 01:45:30,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:45:30,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:30,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-16 01:45:30,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 204 proven. 88 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2023-02-16 01:45:32,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 204 proven. 88 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2023-02-16 01:45:38,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348010005] [2023-02-16 01:45:38,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:38,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989198207] [2023-02-16 01:45:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989198207] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:38,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:38,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-02-16 01:45:38,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290695209] [2023-02-16 01:45:38,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:38,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 01:45:38,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 01:45:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=361, Unknown=1, NotChecked=0, Total=462 [2023-02-16 01:45:38,202 INFO L87 Difference]: Start difference. First operand 322 states and 339 transitions. Second operand has 22 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 14 states have call predecessors, (56), 14 states have call successors, (56) [2023-02-16 01:46:18,972 WARN L233 SmtUtils]: Spent 40.07s on a formula simplification that was a NOOP. DAG size: 161 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:46:20,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:46:23,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:46:38,852 WARN L233 SmtUtils]: Spent 14.25s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:46:41,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:46:52,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:46:54,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:18,534 WARN L233 SmtUtils]: Spent 22.86s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:47:30,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:33,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:35,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:38,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:41,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:44,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:46,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:47,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:49,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:51,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:54,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-16 01:47:56,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:58,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:48:00,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:48:10,581 WARN L233 SmtUtils]: Spent 9.59s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:48:12,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:48:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:48:12,720 INFO L93 Difference]: Finished difference Result 346 states and 373 transitions. [2023-02-16 01:48:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 01:48:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 14 states have call predecessors, (56), 14 states have call successors, (56) Word has length 161 [2023-02-16 01:48:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:48:12,722 INFO L225 Difference]: With dead ends: 346 [2023-02-16 01:48:12,722 INFO L226 Difference]: Without dead ends: 320 [2023-02-16 01:48:12,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 298 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 105.6s TimeCoverageRelationStatistics Valid=261, Invalid=794, Unknown=1, NotChecked=0, Total=1056 [2023-02-16 01:48:12,723 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 31 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 109 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:48:12,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 197 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1098 Invalid, 14 Unknown, 0 Unchecked, 50.6s Time] [2023-02-16 01:48:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-16 01:48:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2023-02-16 01:48:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 194 states have (on average 1.041237113402062) internal successors, (202), 200 states have internal predecessors, (202), 70 states have call successors, (70), 53 states have call predecessors, (70), 52 states have return successors, (67), 63 states have call predecessors, (67), 67 states have call successors, (67) [2023-02-16 01:48:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 339 transitions. [2023-02-16 01:48:12,831 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 339 transitions. Word has length 161 [2023-02-16 01:48:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:48:12,831 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 339 transitions. [2023-02-16 01:48:12,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 14 states have call predecessors, (56), 14 states have call successors, (56) [2023-02-16 01:48:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 339 transitions. [2023-02-16 01:48:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-02-16 01:48:12,833 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:48:12,833 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:48:12,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 01:48:13,038 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,SelfDestructingSolverStorable15 [2023-02-16 01:48:13,038 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:48:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:48:13,038 INFO L85 PathProgramCache]: Analyzing trace with hash -476934806, now seen corresponding path program 3 times [2023-02-16 01:48:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:48:13,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63776348] [2023-02-16 01:48:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:48:13,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:48:13,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:48:13,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665113001] [2023-02-16 01:48:13,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:48:13,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:48:13,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:48:13,051 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) [2023-02-16 01:48:13,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 01:48:14,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 01:48:14,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:48:14,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-16 01:48:14,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:48:47,375 WARN L233 SmtUtils]: Spent 10.76s on a formula simplification. DAG size of input: 67 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:49:18,812 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 7 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-02-16 01:49:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2168 backedges. 485 proven. 59 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-02-16 01:49:19,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:49:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2168 backedges. 350 proven. 19 refuted. 0 times theorem prover too weak. 1799 trivial. 0 not checked. [2023-02-16 01:49:21,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:49:21,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63776348] [2023-02-16 01:49:21,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:49:21,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665113001] [2023-02-16 01:49:21,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665113001] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:49:21,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:49:21,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-02-16 01:49:21,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804506020] [2023-02-16 01:49:21,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:49:21,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 01:49:21,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:49:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 01:49:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=292, Unknown=2, NotChecked=0, Total=380 [2023-02-16 01:49:21,057 INFO L87 Difference]: Start difference. First operand 317 states and 339 transitions. Second operand has 20 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2023-02-16 01:49:25,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:27,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:29,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:31,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:40,982 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 76 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)