./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 6c24879c 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-?-6c24879 [2022-07-12 04:25:20,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:25:20,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:25:20,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:25:20,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:25:20,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:25:20,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:25:20,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:25:20,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:25:20,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:25:20,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:25:20,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:25:20,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:25:20,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:25:20,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:25:20,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:25:20,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:25:20,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:25:20,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:25:20,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:25:20,973 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:25:20,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:25:20,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:25:20,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:25:20,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:25:20,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:25:20,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:25:20,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:25:20,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:25:20,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:25:20,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:25:20,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:25:20,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:25:20,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:25:20,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:25:20,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:25:20,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:25:20,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:25:20,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:25:20,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:25:20,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:25:20,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:25:20,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:25:21,016 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:25:21,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:25:21,017 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:25:21,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:25:21,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:25:21,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:25:21,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:25:21,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:25:21,019 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:25:21,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:25:21,020 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:25:21,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:25:21,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:25:21,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:25:21,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:25:21,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:25:21,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:25:21,021 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:25:21,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:25:21,022 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:25:21,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:25:21,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:25:21,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:25:21,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:25:21,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:25:21,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:25:21,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:25:21,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:25:21,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:25:21,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:25:21,024 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:25:21,025 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:25:21,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:25:21,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c55d57654781cf0634666e1c7d4e43dff0d9410f4306aded3e4e446e1f9e88d1 [2022-07-12 04:25:21,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:25:21,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:25:21,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:25:21,236 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:25:21,237 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:25:21,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-07-12 04:25:21,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154ff1c8f/871cf594fa214f9ba79215a6b8520cab/FLAG7720c7a52 [2022-07-12 04:25:21,630 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:25:21,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2022-07-12 04:25:21,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154ff1c8f/871cf594fa214f9ba79215a6b8520cab/FLAG7720c7a52 [2022-07-12 04:25:22,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154ff1c8f/871cf594fa214f9ba79215a6b8520cab [2022-07-12 04:25:22,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:25:22,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:25:22,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:25:22,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:25:22,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:25:22,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@595db8af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22, skipping insertion in model container [2022-07-12 04:25:22,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:25:22,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:25:22,212 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c[588,601] [2022-07-12 04:25:22,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:25:22,238 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:25:22,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound100.c[588,601] [2022-07-12 04:25:22,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:25:22,281 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:25:22,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22 WrapperNode [2022-07-12 04:25:22,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:25:22,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:25:22,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:25:22,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:25:22,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,327 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-07-12 04:25:22,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:25:22,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:25:22,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:25:22,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:25:22,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:25:22,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:25:22,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:25:22,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:25:22,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (1/1) ... [2022-07-12 04:25:22,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:25:22,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:22,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 04:25:22,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 04:25:22,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:25:22,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:25:22,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:25:22,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:25:22,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 04:25:22,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 04:25:22,455 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:25:22,456 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:25:22,552 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:25:22,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:25:22,558 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 04:25:22,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:25:22 BoogieIcfgContainer [2022-07-12 04:25:22,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:25:22,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:25:22,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:25:22,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:25:22,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:25:22" (1/3) ... [2022-07-12 04:25:22,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f4d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:25:22, skipping insertion in model container [2022-07-12 04:25:22,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:25:22" (2/3) ... [2022-07-12 04:25:22,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f4d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:25:22, skipping insertion in model container [2022-07-12 04:25:22,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:25:22" (3/3) ... [2022-07-12 04:25:22,572 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.c [2022-07-12 04:25:22,583 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:25:22,584 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:25:22,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:25:22,627 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4fabcf82, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5afd157c [2022-07-12 04:25:22,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:25:22,635 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) [2022-07-12 04:25:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 04:25:22,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:22,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:22,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2022-07-12 04:25:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:22,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299965809] [2022-07-12 04:25:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:22,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:25:22,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299965809] [2022-07-12 04:25:22,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299965809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:25:22,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:25:22,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 04:25:22,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367869855] [2022-07-12 04:25:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:25:22,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 04:25:22,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:22,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 04:25:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:25:22,844 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) [2022-07-12 04:25:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:22,870 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2022-07-12 04:25:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 04:25:22,873 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 [2022-07-12 04:25:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:22,880 INFO L225 Difference]: With dead ends: 50 [2022-07-12 04:25:22,880 INFO L226 Difference]: Without dead ends: 22 [2022-07-12 04:25:22,884 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 [2022-07-12 04:25:22,888 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 [2022-07-12 04:25:22,889 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] [2022-07-12 04:25:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-12 04:25:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-12 04:25:22,925 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) [2022-07-12 04:25:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-07-12 04:25:22,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2022-07-12 04:25:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:22,929 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-07-12 04:25:22,930 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) [2022-07-12 04:25:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-07-12 04:25:22,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 04:25:22,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:22,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:22,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:25:22,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:22,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2022-07-12 04:25:22,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:22,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889565294] [2022-07-12 04:25:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:22,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:25:23,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:23,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889565294] [2022-07-12 04:25:23,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889565294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:25:23,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:25:23,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:25:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991088960] [2022-07-12 04:25:23,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:25:23,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:25:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:25:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:25:23,030 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) [2022-07-12 04:25:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:23,074 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2022-07-12 04:25:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:25:23,088 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 [2022-07-12 04:25:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:23,089 INFO L225 Difference]: With dead ends: 36 [2022-07-12 04:25:23,089 INFO L226 Difference]: Without dead ends: 24 [2022-07-12 04:25:23,089 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 [2022-07-12 04:25:23,091 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 [2022-07-12 04:25:23,091 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] [2022-07-12 04:25:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-12 04:25:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-12 04:25:23,096 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) [2022-07-12 04:25:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2022-07-12 04:25:23,098 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2022-07-12 04:25:23,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:23,098 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2022-07-12 04:25:23,098 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) [2022-07-12 04:25:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2022-07-12 04:25:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 04:25:23,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:23,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:23,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 04:25:23,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2022-07-12 04:25:23,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:23,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676666770] [2022-07-12 04:25:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:25:23,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:23,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676666770] [2022-07-12 04:25:23,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676666770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:25:23,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:25:23,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:25:23,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643529667] [2022-07-12 04:25:23,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:25:23,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:25:23,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:25:23,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:25:23,171 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) [2022-07-12 04:25:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:23,275 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2022-07-12 04:25:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:25:23,276 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 [2022-07-12 04:25:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:23,276 INFO L225 Difference]: With dead ends: 30 [2022-07-12 04:25:23,276 INFO L226 Difference]: Without dead ends: 28 [2022-07-12 04:25:23,277 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 [2022-07-12 04:25:23,278 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:23,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:25:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-12 04:25:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-12 04:25:23,303 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) [2022-07-12 04:25:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-07-12 04:25:23,307 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2022-07-12 04:25:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:23,307 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-07-12 04:25:23,307 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) [2022-07-12 04:25:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-07-12 04:25:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 04:25:23,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:23,309 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:23,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 04:25:23,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2022-07-12 04:25:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:23,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333961028] [2022-07-12 04:25:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:23,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:23,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:23,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870411377] [2022-07-12 04:25:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:23,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:23,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:23,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:23,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:25:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:25:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:25:23,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:25:23,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333961028] [2022-07-12 04:25:23,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:23,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870411377] [2022-07-12 04:25:23,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870411377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:25:23,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:25:23,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:25:23,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125132781] [2022-07-12 04:25:23,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:25:23,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:25:23,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:25:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:25:23,489 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:25:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:23,583 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2022-07-12 04:25:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:25:23,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-12 04:25:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:23,584 INFO L225 Difference]: With dead ends: 46 [2022-07-12 04:25:23,585 INFO L226 Difference]: Without dead ends: 44 [2022-07-12 04:25:23,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:25:23,587 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:23,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 121 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:25:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-12 04:25:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-07-12 04:25:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-12 04:25:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-07-12 04:25:23,603 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 13 [2022-07-12 04:25:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:23,607 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-07-12 04:25:23,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:25:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-07-12 04:25:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 04:25:23,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:23,609 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:23,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 04:25:23,809 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 [2022-07-12 04:25:23,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2022-07-12 04:25:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:23,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215830766] [2022-07-12 04:25:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:23,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:23,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:23,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432806763] [2022-07-12 04:25:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:23,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:23,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:23,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:25:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:23,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:25:23,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:25:23,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:25:23,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215830766] [2022-07-12 04:25:23,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:23,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432806763] [2022-07-12 04:25:23,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432806763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:25:23,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:25:23,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:25:23,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026699536] [2022-07-12 04:25:23,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:25:23,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:25:23,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:23,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:25:23,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:25:23,953 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:25:24,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:24,026 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-07-12 04:25:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:25:24,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-07-12 04:25:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:24,027 INFO L225 Difference]: With dead ends: 50 [2022-07-12 04:25:24,027 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 04:25:24,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:25:24,028 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:24,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:25:24,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 04:25:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-07-12 04:25:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-12 04:25:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2022-07-12 04:25:24,039 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18 [2022-07-12 04:25:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:24,040 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2022-07-12 04:25:24,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:25:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2022-07-12 04:25:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 04:25:24,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:24,041 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:24,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:24,263 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 [2022-07-12 04:25:24,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:24,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2022-07-12 04:25:24,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:24,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545522694] [2022-07-12 04:25:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:24,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:24,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:24,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521497465] [2022-07-12 04:25:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:24,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:24,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:24,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:24,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:25:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:25:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:25:24,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:25:24,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:24,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545522694] [2022-07-12 04:25:24,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:24,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521497465] [2022-07-12 04:25:24,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521497465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:25:24,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:25:24,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:25:24,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790870056] [2022-07-12 04:25:24,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:25:24,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:25:24,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:24,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:25:24,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:25:24,433 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 04:25:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:24,516 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2022-07-12 04:25:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:25:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-07-12 04:25:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:24,518 INFO L225 Difference]: With dead ends: 58 [2022-07-12 04:25:24,518 INFO L226 Difference]: Without dead ends: 46 [2022-07-12 04:25:24,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:25:24,519 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:24,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 114 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:25:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-12 04:25:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-12 04:25:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-12 04:25:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-07-12 04:25:24,528 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 23 [2022-07-12 04:25:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:24,529 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-07-12 04:25:24,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 04:25:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-07-12 04:25:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 04:25:24,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:24,530 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] [2022-07-12 04:25:24,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:24,748 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 [2022-07-12 04:25:24,748 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2022-07-12 04:25:24,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:24,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144107079] [2022-07-12 04:25:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:24,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:24,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:24,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352805867] [2022-07-12 04:25:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:24,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:24,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:24,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:24,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:25:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 04:25:24,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 04:25:24,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 04:25:24,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:24,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144107079] [2022-07-12 04:25:24,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:24,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352805867] [2022-07-12 04:25:24,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352805867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:25:24,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:25:24,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-12 04:25:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193007827] [2022-07-12 04:25:24,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:24,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:25:24,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:25:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:25:24,947 INFO L87 Difference]: Start difference. First operand 46 states and 58 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) [2022-07-12 04:25:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:25,120 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2022-07-12 04:25:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 04:25:25,121 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 [2022-07-12 04:25:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:25,123 INFO L225 Difference]: With dead ends: 116 [2022-07-12 04:25:25,123 INFO L226 Difference]: Without dead ends: 100 [2022-07-12 04:25:25,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:25:25,124 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:25,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:25:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-12 04:25:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-07-12 04:25:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 47 states have (on average 1.148936170212766) internal successors, (54), 50 states have internal predecessors, (54), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 04:25:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2022-07-12 04:25:25,141 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 41 [2022-07-12 04:25:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:25,141 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2022-07-12 04:25:25,142 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) [2022-07-12 04:25:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2022-07-12 04:25:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 04:25:25,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:25,143 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:25,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:25,352 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 [2022-07-12 04:25:25,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:25,353 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times [2022-07-12 04:25:25,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:25,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529326436] [2022-07-12 04:25:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:25,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:25,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:25,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714546778] [2022-07-12 04:25:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:25,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:25,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:25,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:25,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:25:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:25,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 04:25:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 04:25:25,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 04:25:25,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:25,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529326436] [2022-07-12 04:25:25,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:25,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714546778] [2022-07-12 04:25:25,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714546778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:25:25,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:25:25,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-07-12 04:25:25,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778684534] [2022-07-12 04:25:25,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:25,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:25:25,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:25:25,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:25:25,628 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-12 04:25:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:25,985 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-07-12 04:25:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:25:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41 [2022-07-12 04:25:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:25,987 INFO L225 Difference]: With dead ends: 114 [2022-07-12 04:25:25,987 INFO L226 Difference]: Without dead ends: 112 [2022-07-12 04:25:25,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:25:25,988 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:25,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:25:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-12 04:25:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-12 04:25:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 59 states have (on average 1.11864406779661) internal successors, (66), 62 states have internal predecessors, (66), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 04:25:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-07-12 04:25:26,021 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 41 [2022-07-12 04:25:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:26,023 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-07-12 04:25:26,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-12 04:25:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-07-12 04:25:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 04:25:26,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:26,026 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] [2022-07-12 04:25:26,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 04:25:26,239 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 [2022-07-12 04:25:26,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times [2022-07-12 04:25:26,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179059119] [2022-07-12 04:25:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:26,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:26,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:26,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539526665] [2022-07-12 04:25:26,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:25:26,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:26,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:26,252 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:26,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:25:26,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:25:26,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:25:26,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 04:25:26,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-12 04:25:26,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-12 04:25:26,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:26,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179059119] [2022-07-12 04:25:26,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:26,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539526665] [2022-07-12 04:25:26,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539526665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:25:26,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:25:26,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-07-12 04:25:26,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525636538] [2022-07-12 04:25:26,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:26,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:25:26,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:26,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:25:26,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:25:26,462 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-07-12 04:25:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:26,599 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2022-07-12 04:25:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:25:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46 [2022-07-12 04:25:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:26,601 INFO L225 Difference]: With dead ends: 118 [2022-07-12 04:25:26,601 INFO L226 Difference]: Without dead ends: 116 [2022-07-12 04:25:26,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:25:26,602 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:26,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 186 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:25:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-12 04:25:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-07-12 04:25:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-12 04:25:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2022-07-12 04:25:26,622 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 46 [2022-07-12 04:25:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:26,622 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2022-07-12 04:25:26,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-07-12 04:25:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2022-07-12 04:25:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 04:25:26,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:26,624 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:26,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:26,846 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 [2022-07-12 04:25:26,847 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:26,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:26,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1802852916, now seen corresponding path program 3 times [2022-07-12 04:25:26,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:26,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270853377] [2022-07-12 04:25:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:26,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:26,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:26,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530409597] [2022-07-12 04:25:26,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:25:26,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:26,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:26,859 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:26,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:25:26,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 04:25:26,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:25:26,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 04:25:26,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-12 04:25:27,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-12 04:25:27,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:27,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270853377] [2022-07-12 04:25:27,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530409597] [2022-07-12 04:25:27,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530409597] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:25:27,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:25:27,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-07-12 04:25:27,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379742130] [2022-07-12 04:25:27,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:27,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:25:27,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:25:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:25:27,289 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:25:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:27,597 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2022-07-12 04:25:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:25:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 51 [2022-07-12 04:25:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:27,599 INFO L225 Difference]: With dead ends: 142 [2022-07-12 04:25:27,599 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 04:25:27,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:25:27,600 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:27,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 104 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:25:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 04:25:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-07-12 04:25:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.0875) internal successors, (87), 83 states have internal predecessors, (87), 29 states have call successors, (29), 21 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-12 04:25:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2022-07-12 04:25:27,628 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 51 [2022-07-12 04:25:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:27,629 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2022-07-12 04:25:27,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:25:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2022-07-12 04:25:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 04:25:27,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:27,632 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] [2022-07-12 04:25:27,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:27,856 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 [2022-07-12 04:25:27,857 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2022-07-12 04:25:27,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:27,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025183328] [2022-07-12 04:25:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:27,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:27,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:27,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285479125] [2022-07-12 04:25:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:27,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:27,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:27,868 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:27,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:25:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 04:25:27,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-12 04:25:28,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:29,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:29,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025183328] [2022-07-12 04:25:29,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:29,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285479125] [2022-07-12 04:25:29,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285479125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:25:29,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:25:29,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-07-12 04:25:29,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532508034] [2022-07-12 04:25:29,303 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:29,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 04:25:29,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:29,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 04:25:29,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-12 04:25:29,304 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-12 04:25:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:29,674 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2022-07-12 04:25:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 04:25:29,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2022-07-12 04:25:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:29,676 INFO L225 Difference]: With dead ends: 133 [2022-07-12 04:25:29,676 INFO L226 Difference]: Without dead ends: 124 [2022-07-12 04:25:29,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:25:29,677 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:29,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 73 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:25:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-12 04:25:29,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-12 04:25:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 04:25:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2022-07-12 04:25:29,693 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 67 [2022-07-12 04:25:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:29,693 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2022-07-12 04:25:29,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-12 04:25:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2022-07-12 04:25:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 04:25:29,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:29,694 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-12 04:25:29,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:29,912 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 [2022-07-12 04:25:29,913 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash -207258189, now seen corresponding path program 4 times [2022-07-12 04:25:29,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:29,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350215838] [2022-07-12 04:25:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:29,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:29,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:29,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144005055] [2022-07-12 04:25:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:25:29,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:29,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:29,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:25:31,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:25:31,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:25:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-12 04:25:31,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 86 proven. 61 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-12 04:25:31,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 111 proven. 23 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-12 04:25:32,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:32,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350215838] [2022-07-12 04:25:32,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:32,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144005055] [2022-07-12 04:25:32,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144005055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:25:32,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:25:32,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-07-12 04:25:32,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886701966] [2022-07-12 04:25:32,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:32,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 04:25:32,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:32,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 04:25:32,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:25:32,646 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 04:25:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:32,926 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-07-12 04:25:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:25:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 74 [2022-07-12 04:25:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:32,928 INFO L225 Difference]: With dead ends: 134 [2022-07-12 04:25:32,928 INFO L226 Difference]: Without dead ends: 132 [2022-07-12 04:25:32,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:25:32,929 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:32,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 54 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:25:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-12 04:25:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-07-12 04:25:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.05) internal successors, (84), 82 states have internal predecessors, (84), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-12 04:25:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2022-07-12 04:25:32,943 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 74 [2022-07-12 04:25:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:32,943 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2022-07-12 04:25:32,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 04:25:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2022-07-12 04:25:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-12 04:25:32,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:32,944 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:32,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:33,152 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 [2022-07-12 04:25:33,152 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 308615369, now seen corresponding path program 2 times [2022-07-12 04:25:33,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:33,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510154522] [2022-07-12 04:25:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:33,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:33,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:33,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941259082] [2022-07-12 04:25:33,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:25:33,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:33,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:33,164 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:33,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:25:33,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:25:33,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:25:33,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 04:25:33,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-12 04:25:33,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:33,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:33,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510154522] [2022-07-12 04:25:33,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:33,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941259082] [2022-07-12 04:25:33,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941259082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:25:33,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:25:33,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-12 04:25:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933184725] [2022-07-12 04:25:33,674 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:33,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:25:33,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:33,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:25:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:25:33,675 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:25:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:33,853 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2022-07-12 04:25:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:25:33,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 95 [2022-07-12 04:25:33,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:33,854 INFO L225 Difference]: With dead ends: 134 [2022-07-12 04:25:33,854 INFO L226 Difference]: Without dead ends: 132 [2022-07-12 04:25:33,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:25:33,855 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:33,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 159 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:25:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-12 04:25:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-07-12 04:25:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 85 states have internal predecessors, (87), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 04:25:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2022-07-12 04:25:33,872 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 95 [2022-07-12 04:25:33,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:33,872 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2022-07-12 04:25:33,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:25:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2022-07-12 04:25:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-12 04:25:33,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:33,873 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:33,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:34,091 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 [2022-07-12 04:25:34,091 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:34,092 INFO L85 PathProgramCache]: Analyzing trace with hash 75049244, now seen corresponding path program 1 times [2022-07-12 04:25:34,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:34,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730126049] [2022-07-12 04:25:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:34,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:34,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:34,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762912059] [2022-07-12 04:25:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:34,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:34,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:34,102 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:34,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:25:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:25:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 04:25:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-12 04:25:34,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:34,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:34,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730126049] [2022-07-12 04:25:34,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:34,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762912059] [2022-07-12 04:25:34,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762912059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:25:34,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:25:34,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-12 04:25:34,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372173734] [2022-07-12 04:25:34,653 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:34,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:25:34,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:34,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:25:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:25:34,654 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-12 04:25:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:34,849 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2022-07-12 04:25:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:25:34,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 100 [2022-07-12 04:25:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:34,850 INFO L225 Difference]: With dead ends: 138 [2022-07-12 04:25:34,850 INFO L226 Difference]: Without dead ends: 125 [2022-07-12 04:25:34,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:25:34,851 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:34,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 168 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:25:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-12 04:25:34,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-12 04:25:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 04:25:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-07-12 04:25:34,867 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 100 [2022-07-12 04:25:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:34,867 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-07-12 04:25:34,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-12 04:25:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-07-12 04:25:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-12 04:25:34,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:34,869 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:34,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:35,083 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 [2022-07-12 04:25:35,083 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:35,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1859389073, now seen corresponding path program 3 times [2022-07-12 04:25:35,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:35,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50546493] [2022-07-12 04:25:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:35,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:35,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:35,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124835846] [2022-07-12 04:25:35,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:25:35,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:35,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:35,094 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:35,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:25:35,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 04:25:35,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:25:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:25:35,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-07-12 04:25:35,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:37,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50546493] [2022-07-12 04:25:37,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:37,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124835846] [2022-07-12 04:25:37,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124835846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:25:37,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:25:37,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-07-12 04:25:37,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833042626] [2022-07-12 04:25:37,694 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:37,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:25:37,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:37,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:25:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=69, Unknown=1, NotChecked=0, Total=90 [2022-07-12 04:25:37,695 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-12 04:25:41,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:25:43,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:25:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:44,593 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2022-07-12 04:25:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 04:25:44,594 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 123 [2022-07-12 04:25:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:44,595 INFO L225 Difference]: With dead ends: 134 [2022-07-12 04:25:44,595 INFO L226 Difference]: Without dead ends: 132 [2022-07-12 04:25:44,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=36, Invalid=118, Unknown=2, NotChecked=0, Total=156 [2022-07-12 04:25:44,596 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 14 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:44,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-07-12 04:25:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-12 04:25:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-07-12 04:25:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.036144578313253) internal successors, (86), 85 states have internal predecessors, (86), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-12 04:25:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-07-12 04:25:44,613 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 123 [2022-07-12 04:25:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:44,613 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-07-12 04:25:44,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-12 04:25:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-07-12 04:25:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-12 04:25:44,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:44,615 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] [2022-07-12 04:25:44,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:44,821 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 [2022-07-12 04:25:44,821 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2022-07-12 04:25:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:44,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554646284] [2022-07-12 04:25:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:44,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:44,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:44,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433030328] [2022-07-12 04:25:44,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:25:44,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:44,854 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:44,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 04:25:44,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:25:44,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:25:44,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 04:25:44,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-12 04:25:45,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-07-12 04:25:45,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:45,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554646284] [2022-07-12 04:25:45,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:45,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433030328] [2022-07-12 04:25:45,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433030328] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:25:45,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:25:45,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-12 04:25:45,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270156856] [2022-07-12 04:25:45,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:45,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:25:45,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:25:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:25:45,233 INFO L87 Difference]: Start difference. First operand 131 states and 135 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) [2022-07-12 04:25:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:45,630 INFO L93 Difference]: Finished difference Result 390 states and 406 transitions. [2022-07-12 04:25:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:25:45,631 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 [2022-07-12 04:25:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:45,634 INFO L225 Difference]: With dead ends: 390 [2022-07-12 04:25:45,634 INFO L226 Difference]: Without dead ends: 365 [2022-07-12 04:25:45,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:25:45,636 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 117 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:45,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 351 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:25:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-12 04:25:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 313. [2022-07-12 04:25:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 196 states have (on average 1.0459183673469388) internal successors, (205), 203 states have internal predecessors, (205), 63 states have call successors, (63), 54 states have call predecessors, (63), 53 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-07-12 04:25:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 329 transitions. [2022-07-12 04:25:45,680 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 329 transitions. Word has length 125 [2022-07-12 04:25:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:45,681 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 329 transitions. [2022-07-12 04:25:45,681 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) [2022-07-12 04:25:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 329 transitions. [2022-07-12 04:25:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-12 04:25:45,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:45,683 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:25:45,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:45,895 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 [2022-07-12 04:25:45,895 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash 709017654, now seen corresponding path program 2 times [2022-07-12 04:25:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:45,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853234082] [2022-07-12 04:25:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:45,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:45,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:45,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990124032] [2022-07-12 04:25:45,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:25:45,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:45,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:45,911 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:45,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 04:25:45,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:25:45,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:25:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 04:25:45,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:25:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-07-12 04:25:46,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:25:46,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:25:46,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853234082] [2022-07-12 04:25:46,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:25:46,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990124032] [2022-07-12 04:25:46,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990124032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:25:46,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:25:46,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-07-12 04:25:46,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704024792] [2022-07-12 04:25:46,391 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:25:46,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:25:46,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:25:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:25:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:25:46,392 INFO L87 Difference]: Start difference. First operand 313 states and 329 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-07-12 04:25:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:25:46,667 INFO L93 Difference]: Finished difference Result 323 states and 338 transitions. [2022-07-12 04:25:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 04:25:46,668 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 128 [2022-07-12 04:25:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:25:46,670 INFO L225 Difference]: With dead ends: 323 [2022-07-12 04:25:46,670 INFO L226 Difference]: Without dead ends: 312 [2022-07-12 04:25:46,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:25:46,671 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:25:46,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 202 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:25:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-12 04:25:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-07-12 04:25:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 202 states have internal predecessors, (204), 62 states have call successors, (62), 54 states have call predecessors, (62), 53 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-07-12 04:25:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2022-07-12 04:25:46,712 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 128 [2022-07-12 04:25:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:25:46,713 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2022-07-12 04:25:46,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-07-12 04:25:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2022-07-12 04:25:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-12 04:25:46,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:25:46,715 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] [2022-07-12 04:25:46,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 04:25:46,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:46,936 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:25:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:25:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1972302768, now seen corresponding path program 3 times [2022-07-12 04:25:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:25:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693213525] [2022-07-12 04:25:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:25:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:25:46,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:25:46,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306169837] [2022-07-12 04:25:46,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:25:46,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:25:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:25:46,946 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:25:46,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 04:25:48,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:25:48,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:25:48,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 04:25:48,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:26:38,464 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:26:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 366 proven. 76 refuted. 0 times theorem prover too weak. 1096 trivial. 0 not checked. [2022-07-12 04:26:38,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:26:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 271 proven. 34 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2022-07-12 04:26:42,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:26:42,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693213525] [2022-07-12 04:26:42,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:26:42,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306169837] [2022-07-12 04:26:42,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306169837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:26:42,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:26:42,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-07-12 04:26:42,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554439362] [2022-07-12 04:26:42,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:26:42,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:26:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:26:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:26:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=235, Unknown=2, NotChecked=0, Total=306 [2022-07-12 04:26:42,628 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2022-07-12 04:26:48,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:26:51,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:26:56,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:27:01,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:27:03,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:27:05,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:27:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:27:07,170 INFO L93 Difference]: Finished difference Result 343 states and 350 transitions. [2022-07-12 04:27:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 04:27:07,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) Word has length 156 [2022-07-12 04:27:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:27:07,172 INFO L225 Difference]: With dead ends: 343 [2022-07-12 04:27:07,172 INFO L226 Difference]: Without dead ends: 290 [2022-07-12 04:27:07,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=142, Invalid=455, Unknown=3, NotChecked=0, Total=600 [2022-07-12 04:27:07,173 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 67 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:27:07,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 104 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 254 Invalid, 3 Unknown, 35 Unchecked, 18.7s Time] [2022-07-12 04:27:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-12 04:27:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-07-12 04:27:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 187 states have (on average 1.0053475935828877) internal successors, (188), 187 states have internal predecessors, (188), 52 states have call successors, (52), 51 states have call predecessors, (52), 50 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-07-12 04:27:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 291 transitions. [2022-07-12 04:27:07,207 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 291 transitions. Word has length 156 [2022-07-12 04:27:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:27:07,208 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 291 transitions. [2022-07-12 04:27:07,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2022-07-12 04:27:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 291 transitions. [2022-07-12 04:27:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-07-12 04:27:07,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:27:07,211 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:27:07,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 04:27:07,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 04:27:07,418 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:27:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:27:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1951591730, now seen corresponding path program 3 times [2022-07-12 04:27:07,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:27:07,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278627033] [2022-07-12 04:27:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:27:07,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:27:07,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:27:07,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267863581] [2022-07-12 04:27:07,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:27:07,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:27:07,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:27:07,430 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:27:07,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 04:27:08,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-07-12 04:27:08,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:27:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 04:27:08,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:27:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 300 proven. 4880 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-07-12 04:27:08,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:27:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 102 proven. 380 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2022-07-12 04:27:08,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:27:08,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278627033] [2022-07-12 04:27:08,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:27:08,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267863581] [2022-07-12 04:27:08,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267863581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:27:08,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:27:08,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-12 04:27:08,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911415732] [2022-07-12 04:27:08,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:27:08,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 04:27:08,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:27:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 04:27:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-12 04:27:08,778 INFO L87 Difference]: Start difference. First operand 290 states and 291 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) [2022-07-12 04:27:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:27:09,598 INFO L93 Difference]: Finished difference Result 636 states and 648 transitions. [2022-07-12 04:27:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-12 04:27:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) Word has length 293 [2022-07-12 04:27:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:27:09,603 INFO L225 Difference]: With dead ends: 636 [2022-07-12 04:27:09,603 INFO L226 Difference]: Without dead ends: 626 [2022-07-12 04:27:09,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 04:27:09,605 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 292 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:27:09,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 389 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 04:27:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-07-12 04:27:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2022-07-12 04:27:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 403 states have (on average 1.0024813895781637) internal successors, (404), 403 states have internal predecessors, (404), 112 states have call successors, (112), 111 states have call predecessors, (112), 110 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2022-07-12 04:27:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 627 transitions. [2022-07-12 04:27:09,675 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 627 transitions. Word has length 293 [2022-07-12 04:27:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:27:09,676 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 627 transitions. [2022-07-12 04:27:09,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) [2022-07-12 04:27:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 627 transitions. [2022-07-12 04:27:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2022-07-12 04:27:09,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:27:09,682 INFO L195 NwaCegarLoop]: trace histogram [112, 111, 111, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:27:09,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-12 04:27:09,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:27:09,890 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:27:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:27:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1604221590, now seen corresponding path program 4 times [2022-07-12 04:27:09,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:27:09,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062280748] [2022-07-12 04:27:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:27:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:27:09,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:27:09,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742734422] [2022-07-12 04:27:09,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:27:09,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:27:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:27:09,922 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:27:09,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 04:27:10,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:27:10,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:27:10,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 04:27:10,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:27:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26534 backedges. 660 proven. 24992 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2022-07-12 04:27:11,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:27:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 26534 backedges. 222 proven. 1892 refuted. 0 times theorem prover too weak. 24420 trivial. 0 not checked. [2022-07-12 04:27:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:27:12,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062280748] [2022-07-12 04:27:12,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:27:12,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742734422] [2022-07-12 04:27:12,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742734422] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:27:12,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:27:12,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-07-12 04:27:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077935845] [2022-07-12 04:27:12,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:27:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 04:27:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:27:12,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 04:27:12,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 04:27:12,211 INFO L87 Difference]: Start difference. First operand 626 states and 627 transitions. Second operand has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) [2022-07-12 04:27:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:27:14,438 INFO L93 Difference]: Finished difference Result 1308 states and 1332 transitions. [2022-07-12 04:27:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-12 04:27:14,439 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) Word has length 629 [2022-07-12 04:27:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:27:14,444 INFO L225 Difference]: With dead ends: 1308 [2022-07-12 04:27:14,444 INFO L226 Difference]: Without dead ends: 1298 [2022-07-12 04:27:14,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1301 GetRequests, 1208 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 04:27:14,448 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 488 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:27:14,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 736 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 04:27:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-07-12 04:27:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1298. [2022-07-12 04:27:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 835 states have (on average 1.0011976047904192) internal successors, (836), 835 states have internal predecessors, (836), 232 states have call successors, (232), 231 states have call predecessors, (232), 230 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2022-07-12 04:27:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1299 transitions. [2022-07-12 04:27:14,600 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1299 transitions. Word has length 629 [2022-07-12 04:27:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:27:14,602 INFO L495 AbstractCegarLoop]: Abstraction has 1298 states and 1299 transitions. [2022-07-12 04:27:14,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) [2022-07-12 04:27:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1299 transitions. [2022-07-12 04:27:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1302 [2022-07-12 04:27:14,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:27:14,617 INFO L195 NwaCegarLoop]: trace histogram [232, 231, 231, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:27:14,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 04:27:14,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:27:14,825 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:27:14,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:27:14,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1590306266, now seen corresponding path program 5 times [2022-07-12 04:27:14,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:27:14,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16580266] [2022-07-12 04:27:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:27:14,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:27:14,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:27:14,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121506352] [2022-07-12 04:27:14,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:27:14,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:27:14,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:27:14,856 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:27:14,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 04:27:34,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 163 check-sat command(s) [2022-07-12 04:27:34,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:27:34,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 2774 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-12 04:27:34,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:27:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 115094 backedges. 1380 proven. 111872 refuted. 0 times theorem prover too weak. 1842 trivial. 0 not checked. [2022-07-12 04:27:36,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:27:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 115094 backedges. 462 proven. 8372 refuted. 0 times theorem prover too weak. 106260 trivial. 0 not checked. [2022-07-12 04:27:39,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:27:39,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16580266] [2022-07-12 04:27:39,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:27:39,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121506352] [2022-07-12 04:27:39,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121506352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:27:39,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:27:39,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 98 [2022-07-12 04:27:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510486096] [2022-07-12 04:27:39,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:27:39,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-12 04:27:39,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:27:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-12 04:27:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 04:27:39,848 INFO L87 Difference]: Start difference. First operand 1298 states and 1299 transitions. Second operand has 98 states, 98 states have (on average 4.387755102040816) internal successors, (430), 98 states have internal predecessors, (430), 93 states have call successors, (463), 48 states have call predecessors, (463), 48 states have return successors, (462), 93 states have call predecessors, (462), 93 states have call successors, (462) [2022-07-12 04:27:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:27:46,620 INFO L93 Difference]: Finished difference Result 2652 states and 2700 transitions. [2022-07-12 04:27:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-07-12 04:27:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.387755102040816) internal successors, (430), 98 states have internal predecessors, (430), 93 states have call successors, (463), 48 states have call predecessors, (463), 48 states have return successors, (462), 93 states have call predecessors, (462), 93 states have call successors, (462) Word has length 1301 [2022-07-12 04:27:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:27:46,631 INFO L225 Difference]: With dead ends: 2652 [2022-07-12 04:27:46,631 INFO L226 Difference]: Without dead ends: 2642 [2022-07-12 04:27:46,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2693 GetRequests, 2504 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-07-12 04:27:46,640 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 1001 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 1277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 3877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1277 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:27:46,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1430 Invalid, 3877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1277 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-12 04:27:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2022-07-12 04:27:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2642. [2022-07-12 04:27:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 1699 states have (on average 1.0005885815185402) internal successors, (1700), 1699 states have internal predecessors, (1700), 472 states have call successors, (472), 471 states have call predecessors, (472), 470 states have return successors, (471), 471 states have call predecessors, (471), 471 states have call successors, (471) [2022-07-12 04:27:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 2643 transitions. [2022-07-12 04:27:46,926 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 2643 transitions. Word has length 1301 [2022-07-12 04:27:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:27:46,928 INFO L495 AbstractCegarLoop]: Abstraction has 2642 states and 2643 transitions. [2022-07-12 04:27:46,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.387755102040816) internal successors, (430), 98 states have internal predecessors, (430), 93 states have call successors, (463), 48 states have call predecessors, (463), 48 states have return successors, (462), 93 states have call predecessors, (462), 93 states have call successors, (462) [2022-07-12 04:27:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 2643 transitions. [2022-07-12 04:27:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2646 [2022-07-12 04:27:46,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:27:46,976 INFO L195 NwaCegarLoop]: trace histogram [472, 471, 471, 95, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:27:46,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 04:27:47,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:27:47,191 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:27:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:27:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 112646470, now seen corresponding path program 6 times [2022-07-12 04:27:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:27:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703120612] [2022-07-12 04:27:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:27:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:27:47,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:27:47,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570558625] [2022-07-12 04:27:47,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:27:47,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:27:47,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:27:47,284 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:27:47,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 04:29:32,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 328 check-sat command(s) [2022-07-12 04:29:32,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:29:32,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 5579 conjuncts, 191 conjunts are in the unsatisfiable core [2022-07-12 04:29:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:29:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 478838 backedges. 2820 proven. 472256 refuted. 0 times theorem prover too weak. 3762 trivial. 0 not checked. [2022-07-12 04:29:38,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:29:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 478838 backedges. 942 proven. 35156 refuted. 0 times theorem prover too weak. 442740 trivial. 0 not checked. [2022-07-12 04:29:40,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:29:40,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703120612] [2022-07-12 04:29:40,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:29:40,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570558625] [2022-07-12 04:29:40,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570558625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:29:40,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:29:40,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 98] total 104 [2022-07-12 04:29:40,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708247203] [2022-07-12 04:29:40,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:29:40,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-12 04:29:40,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:29:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-12 04:29:40,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-07-12 04:29:40,446 INFO L87 Difference]: Start difference. First operand 2642 states and 2643 transitions. Second operand has 104 states, 104 states have (on average 5.721153846153846) internal successors, (595), 104 states have internal predecessors, (595), 100 states have call successors, (943), 96 states have call predecessors, (943), 96 states have return successors, (942), 100 states have call predecessors, (942), 100 states have call successors, (942) [2022-07-12 04:29:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:29:46,991 INFO L93 Difference]: Finished difference Result 2820 states and 2826 transitions. [2022-07-12 04:29:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-07-12 04:29:46,993 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 5.721153846153846) internal successors, (595), 104 states have internal predecessors, (595), 100 states have call successors, (943), 96 states have call predecessors, (943), 96 states have return successors, (942), 100 states have call predecessors, (942), 100 states have call successors, (942) Word has length 2645 [2022-07-12 04:29:46,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:29:47,007 INFO L225 Difference]: With dead ends: 2820 [2022-07-12 04:29:47,008 INFO L226 Difference]: Without dead ends: 2810 [2022-07-12 04:29:47,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5387 GetRequests, 5185 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5055 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15349, Invalid=25657, Unknown=0, NotChecked=0, Total=41006 [2022-07-12 04:29:47,014 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 614 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 2627 mSolverCounterSat, 954 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 954 IncrementalHoareTripleChecker+Valid, 2627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:29:47,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1503 Invalid, 3581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [954 Valid, 2627 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-12 04:29:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2022-07-12 04:29:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 2810. [2022-07-12 04:29:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 1807 states have (on average 1.0005534034311012) internal successors, (1808), 1807 states have internal predecessors, (1808), 502 states have call successors, (502), 501 states have call predecessors, (502), 500 states have return successors, (501), 501 states have call predecessors, (501), 501 states have call successors, (501) [2022-07-12 04:29:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 2811 transitions. [2022-07-12 04:29:47,325 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 2811 transitions. Word has length 2645 [2022-07-12 04:29:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:29:47,329 INFO L495 AbstractCegarLoop]: Abstraction has 2810 states and 2811 transitions. [2022-07-12 04:29:47,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 5.721153846153846) internal successors, (595), 104 states have internal predecessors, (595), 100 states have call successors, (943), 96 states have call predecessors, (943), 96 states have return successors, (942), 100 states have call predecessors, (942), 100 states have call successors, (942) [2022-07-12 04:29:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 2811 transitions. [2022-07-12 04:29:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2814 [2022-07-12 04:29:47,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:29:47,417 INFO L195 NwaCegarLoop]: trace histogram [502, 501, 501, 101, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:29:47,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 04:29:47,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:29:47,631 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:29:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:29:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1672696022, now seen corresponding path program 7 times [2022-07-12 04:29:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:29:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068208282] [2022-07-12 04:29:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:29:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:29:47,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:29:47,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255497078] [2022-07-12 04:29:47,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:29:47,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:29:47,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:29:47,681 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:29:47,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process