./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 01:00:49,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 01:00:49,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 01:00:49,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 01:00:49,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 01:00:49,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 01:00:49,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 01:00:49,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 01:00:49,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 01:00:49,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 01:00:49,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 01:00:49,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 01:00:49,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 01:00:49,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 01:00:49,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 01:00:49,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 01:00:49,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 01:00:49,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 01:00:49,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 01:00:49,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 01:00:49,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 01:00:49,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 01:00:49,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 01:00:49,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 01:00:49,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 01:00:49,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 01:00:49,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 01:00:49,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 01:00:49,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 01:00:49,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 01:00:49,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 01:00:49,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 01:00:49,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 01:00:49,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 01:00:49,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 01:00:49,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 01:00:49,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 01:00:49,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 01:00:49,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 01:00:49,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 01:00:49,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 01:00:49,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 01:00:49,149 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 01:00:49,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 01:00:49,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 01:00:49,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 01:00:49,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 01:00:49,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 01:00:49,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 01:00:49,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 01:00:49,152 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 01:00:49,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 01:00:49,153 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 01:00:49,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 01:00:49,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 01:00:49,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 01:00:49,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 01:00:49,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 01:00:49,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 01:00:49,154 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 01:00:49,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 01:00:49,154 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 01:00:49,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 01:00:49,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 01:00:49,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 01:00:49,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 01:00:49,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:00:49,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 01:00:49,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 01:00:49,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 01:00:49,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 01:00:49,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 01:00:49,157 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 01:00:49,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 01:00:49,157 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 01:00:49,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 01:00:49,157 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 01:00:49,158 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2023-02-18 01:00:49,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 01:00:49,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 01:00:49,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 01:00:49,399 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 01:00:49,399 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 01:00:49,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-02-18 01:00:50,511 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 01:00:50,703 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 01:00:50,703 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2023-02-18 01:00:50,710 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dbc9fb6e/bdf2344f87ce4a62aaa96d91f8480cb2/FLAG170e33380 [2023-02-18 01:00:50,723 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dbc9fb6e/bdf2344f87ce4a62aaa96d91f8480cb2 [2023-02-18 01:00:50,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 01:00:50,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 01:00:50,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 01:00:50,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 01:00:50,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 01:00:50,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a319c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50, skipping insertion in model container [2023-02-18 01:00:50,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 01:00:50,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 01:00:50,881 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2023-02-18 01:00:50,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:00:50,903 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 01:00:50,911 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2023-02-18 01:00:50,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:00:50,929 INFO L208 MainTranslator]: Completed translation [2023-02-18 01:00:50,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50 WrapperNode [2023-02-18 01:00:50,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 01:00:50,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 01:00:50,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 01:00:50,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 01:00:50,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,958 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2023-02-18 01:00:50,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 01:00:50,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 01:00:50,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 01:00:50,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 01:00:50,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,985 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 01:00:50,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 01:00:50,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 01:00:50,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 01:00:50,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (1/1) ... [2023-02-18 01:00:50,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:00:51,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:51,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 01:00:51,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 01:00:51,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 01:00:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 01:00:51,059 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 01:00:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 01:00:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 01:00:51,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 01:00:51,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 01:00:51,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 01:00:51,113 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 01:00:51,114 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 01:00:51,232 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 01:00:51,237 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 01:00:51,237 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 01:00:51,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:00:51 BoogieIcfgContainer [2023-02-18 01:00:51,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 01:00:51,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 01:00:51,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 01:00:51,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 01:00:51,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 01:00:50" (1/3) ... [2023-02-18 01:00:51,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3a4178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:00:51, skipping insertion in model container [2023-02-18 01:00:51,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:00:50" (2/3) ... [2023-02-18 01:00:51,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3a4178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:00:51, skipping insertion in model container [2023-02-18 01:00:51,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:00:51" (3/3) ... [2023-02-18 01:00:51,246 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2023-02-18 01:00:51,261 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 01:00:51,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 01:00:51,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 01:00:51,305 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d8e37c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 01:00:51,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 01:00:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 01:00:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 01:00:51,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:51,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:51,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:51,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:51,321 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2023-02-18 01:00:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:51,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604410313] [2023-02-18 01:00:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:51,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:51,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:51,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604410313] [2023-02-18 01:00:51,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 01:00:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012680138] [2023-02-18 01:00:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:51,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:51,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:51,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:51,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 01:00:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:51,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 01:00:51,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 01:00:51,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:00:51,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012680138] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:00:51,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:00:51,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 01:00:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555118221] [2023-02-18 01:00:51,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:00:51,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 01:00:51,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 01:00:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 01:00:51,625 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:00:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:51,645 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2023-02-18 01:00:51,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 01:00:51,659 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-18 01:00:51,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:51,665 INFO L225 Difference]: With dead ends: 61 [2023-02-18 01:00:51,666 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 01:00:51,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 01:00:51,674 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:51,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:00:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 01:00:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 01:00:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 01:00:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-02-18 01:00:51,725 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2023-02-18 01:00:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:51,726 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-02-18 01:00:51,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:00:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-02-18 01:00:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 01:00:51,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:51,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:51,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 01:00:51,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 01:00:51,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2023-02-18 01:00:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:51,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584180268] [2023-02-18 01:00:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:51,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:51,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:51,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126903463] [2023-02-18 01:00:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:51,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:51,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:51,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:51,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 01:00:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:52,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 01:00:52,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 01:00:52,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:00:52,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:52,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584180268] [2023-02-18 01:00:52,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:52,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126903463] [2023-02-18 01:00:52,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126903463] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:00:52,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:00:52,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 01:00:52,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731957786] [2023-02-18 01:00:52,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:00:52,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 01:00:52,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:52,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 01:00:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 01:00:52,061 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:00:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:52,132 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-02-18 01:00:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 01:00:52,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-02-18 01:00:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:52,134 INFO L225 Difference]: With dead ends: 47 [2023-02-18 01:00:52,134 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 01:00:52,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 01:00:52,136 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:52,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 104 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:00:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 01:00:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-02-18 01:00:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 01:00:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-02-18 01:00:52,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2023-02-18 01:00:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:52,145 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-02-18 01:00:52,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:00:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-02-18 01:00:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 01:00:52,146 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:52,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:52,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 01:00:52,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 01:00:52,355 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2023-02-18 01:00:52,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:52,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403243179] [2023-02-18 01:00:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:52,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:52,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:52,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960489299] [2023-02-18 01:00:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:52,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:52,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:52,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:52,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 01:00:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:52,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 01:00:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 01:00:52,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:00:52,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:52,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403243179] [2023-02-18 01:00:52,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:52,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960489299] [2023-02-18 01:00:52,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960489299] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:00:52,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:00:52,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 01:00:52,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224479865] [2023-02-18 01:00:52,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:00:52,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 01:00:52,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:52,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 01:00:52,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 01:00:52,497 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:00:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:52,620 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-18 01:00:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 01:00:52,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-02-18 01:00:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:52,625 INFO L225 Difference]: With dead ends: 46 [2023-02-18 01:00:52,626 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 01:00:52,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 01:00:52,631 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:52,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 140 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:00:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 01:00:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-02-18 01:00:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 01:00:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2023-02-18 01:00:52,648 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2023-02-18 01:00:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:52,649 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2023-02-18 01:00:52,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:00:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2023-02-18 01:00:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 01:00:52,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:52,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:52,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 01:00:52,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:52,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2023-02-18 01:00:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:52,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608125416] [2023-02-18 01:00:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:52,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:52,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:52,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865446779] [2023-02-18 01:00:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:52,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:52,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:52,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:52,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 01:00:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 01:00:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 01:00:52,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:00:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 01:00:53,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:53,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608125416] [2023-02-18 01:00:53,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:53,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865446779] [2023-02-18 01:00:53,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865446779] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:00:53,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:00:53,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-18 01:00:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276804440] [2023-02-18 01:00:53,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:00:53,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 01:00:53,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 01:00:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 01:00:53,045 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:00:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:53,238 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2023-02-18 01:00:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 01:00:53,239 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-18 01:00:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:53,247 INFO L225 Difference]: With dead ends: 96 [2023-02-18 01:00:53,247 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 01:00:53,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 01:00:53,254 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:53,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:00:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 01:00:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2023-02-18 01:00:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 01:00:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2023-02-18 01:00:53,281 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2023-02-18 01:00:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:53,282 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2023-02-18 01:00:53,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:00:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2023-02-18 01:00:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 01:00:53,284 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:53,284 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:53,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 01:00:53,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:53,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2023-02-18 01:00:53,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:53,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455343678] [2023-02-18 01:00:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:53,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:53,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:53,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162551078] [2023-02-18 01:00:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:53,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:53,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:53,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:53,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 01:00:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 01:00:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 01:00:53,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:00:53,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:53,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455343678] [2023-02-18 01:00:53,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:53,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162551078] [2023-02-18 01:00:53,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162551078] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:00:53,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:00:53,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 01:00:53,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266334002] [2023-02-18 01:00:53,813 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:00:53,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 01:00:53,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:53,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 01:00:53,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-02-18 01:00:53,814 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:00:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:54,066 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2023-02-18 01:00:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 01:00:54,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-02-18 01:00:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:54,067 INFO L225 Difference]: With dead ends: 79 [2023-02-18 01:00:54,067 INFO L226 Difference]: Without dead ends: 77 [2023-02-18 01:00:54,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-18 01:00:54,068 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:54,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 135 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 01:00:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-18 01:00:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2023-02-18 01:00:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 01:00:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2023-02-18 01:00:54,081 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2023-02-18 01:00:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:54,082 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2023-02-18 01:00:54,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:00:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2023-02-18 01:00:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 01:00:54,083 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:54,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:54,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 01:00:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:54,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:54,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2023-02-18 01:00:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:54,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937899179] [2023-02-18 01:00:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:54,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:54,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940699740] [2023-02-18 01:00:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:54,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:54,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:54,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 01:00:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:54,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 01:00:54,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 01:00:54,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:00:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:00:54,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:54,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937899179] [2023-02-18 01:00:54,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940699740] [2023-02-18 01:00:54,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940699740] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:00:54,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:00:54,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-02-18 01:00:54,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908973145] [2023-02-18 01:00:54,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:00:54,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 01:00:54,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:54,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 01:00:54,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 01:00:54,445 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 01:00:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:54,630 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2023-02-18 01:00:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 01:00:54,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-02-18 01:00:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:54,632 INFO L225 Difference]: With dead ends: 104 [2023-02-18 01:00:54,632 INFO L226 Difference]: Without dead ends: 102 [2023-02-18 01:00:54,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-18 01:00:54,633 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:54,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 253 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:00:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-18 01:00:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-02-18 01:00:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-02-18 01:00:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2023-02-18 01:00:54,667 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2023-02-18 01:00:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:54,668 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2023-02-18 01:00:54,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 01:00:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2023-02-18 01:00:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 01:00:54,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:54,674 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:54,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 01:00:54,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:54,880 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2023-02-18 01:00:54,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:54,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265548318] [2023-02-18 01:00:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:54,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:54,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:54,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457357521] [2023-02-18 01:00:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:54,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:54,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:54,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:54,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 01:00:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 01:00:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 01:00:54,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:00:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 01:00:55,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:55,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265548318] [2023-02-18 01:00:55,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457357521] [2023-02-18 01:00:55,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457357521] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 01:00:55,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:00:55,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-02-18 01:00:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959604662] [2023-02-18 01:00:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:00:55,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 01:00:55,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:55,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 01:00:55,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 01:00:55,036 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 01:00:55,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:55,096 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2023-02-18 01:00:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 01:00:55,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-02-18 01:00:55,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:55,098 INFO L225 Difference]: With dead ends: 144 [2023-02-18 01:00:55,098 INFO L226 Difference]: Without dead ends: 142 [2023-02-18 01:00:55,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 01:00:55,099 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:55,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:00:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-18 01:00:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2023-02-18 01:00:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-18 01:00:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2023-02-18 01:00:55,120 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2023-02-18 01:00:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:55,121 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2023-02-18 01:00:55,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 01:00:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2023-02-18 01:00:55,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 01:00:55,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:55,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:55,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 01:00:55,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:55,332 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:55,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2023-02-18 01:00:55,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:55,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268650229] [2023-02-18 01:00:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:55,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:55,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:55,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094755365] [2023-02-18 01:00:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:55,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:55,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:55,361 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:55,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 01:00:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-18 01:00:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 01:00:55,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:00:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:00:55,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268650229] [2023-02-18 01:00:55,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094755365] [2023-02-18 01:00:55,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094755365] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:00:55,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:00:55,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2023-02-18 01:00:55,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311220909] [2023-02-18 01:00:55,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:00:55,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 01:00:55,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:55,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 01:00:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-02-18 01:00:55,599 INFO L87 Difference]: Start difference. First operand 136 states and 196 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 01:00:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:57,720 INFO L93 Difference]: Finished difference Result 183 states and 256 transitions. [2023-02-18 01:00:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 01:00:57,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-02-18 01:00:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:57,723 INFO L225 Difference]: With dead ends: 183 [2023-02-18 01:00:57,723 INFO L226 Difference]: Without dead ends: 181 [2023-02-18 01:00:57,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 01:00:57,725 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:57,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 138 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 01:00:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-18 01:00:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 168. [2023-02-18 01:00:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 114 states have internal predecessors, (139), 49 states have call successors, (49), 8 states have call predecessors, (49), 8 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2023-02-18 01:00:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 236 transitions. [2023-02-18 01:00:57,765 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 236 transitions. Word has length 32 [2023-02-18 01:00:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:57,765 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 236 transitions. [2023-02-18 01:00:57,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 17 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 01:00:57,765 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 236 transitions. [2023-02-18 01:00:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 01:00:57,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:57,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:57,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 01:00:57,971 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,SelfDestructingSolverStorable7 [2023-02-18 01:00:57,972 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:57,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:57,972 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2023-02-18 01:00:57,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:57,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981674851] [2023-02-18 01:00:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:57,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:57,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:57,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192957240] [2023-02-18 01:00:57,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:00:57,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:57,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:57,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:57,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 01:00:58,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:00:58,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:00:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 01:00:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:00:58,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:00:58,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:58,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981674851] [2023-02-18 01:00:58,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:58,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192957240] [2023-02-18 01:00:58,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192957240] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:00:58,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:00:58,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 01:00:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797730544] [2023-02-18 01:00:58,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:00:58,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 01:00:58,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 01:00:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 01:00:58,050 INFO L87 Difference]: Start difference. First operand 168 states and 236 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 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) [2023-02-18 01:00:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:58,145 INFO L93 Difference]: Finished difference Result 214 states and 296 transitions. [2023-02-18 01:00:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 01:00:58,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 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 32 [2023-02-18 01:00:58,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:58,147 INFO L225 Difference]: With dead ends: 214 [2023-02-18 01:00:58,147 INFO L226 Difference]: Without dead ends: 133 [2023-02-18 01:00:58,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 01:00:58,149 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:58,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:00:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-18 01:00:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2023-02-18 01:00:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 73 states have internal predecessors, (83), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 01:00:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 144 transitions. [2023-02-18 01:00:58,185 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 144 transitions. Word has length 32 [2023-02-18 01:00:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:58,185 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 144 transitions. [2023-02-18 01:00:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 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) [2023-02-18 01:00:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 144 transitions. [2023-02-18 01:00:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 01:00:58,186 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:58,186 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:58,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 01:00:58,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:58,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2023-02-18 01:00:58,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:58,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600498791] [2023-02-18 01:00:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:58,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:58,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:58,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581207241] [2023-02-18 01:00:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:58,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:58,402 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:58,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 01:00:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 01:00:58,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 01:00:58,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:00:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 01:00:58,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600498791] [2023-02-18 01:00:58,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581207241] [2023-02-18 01:00:58,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581207241] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 01:00:58,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:00:58,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-18 01:00:58,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990290245] [2023-02-18 01:00:58,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:00:58,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 01:00:58,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:58,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 01:00:58,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 01:00:58,577 INFO L87 Difference]: Start difference. First operand 110 states and 144 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 01:00:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:00:58,635 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2023-02-18 01:00:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 01:00:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-02-18 01:00:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:00:58,637 INFO L225 Difference]: With dead ends: 116 [2023-02-18 01:00:58,637 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 01:00:58,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 01:00:58,638 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:00:58,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 102 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:00:58,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 01:00:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-02-18 01:00:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 73 states have (on average 1.178082191780822) internal successors, (86), 76 states have internal predecessors, (86), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 01:00:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2023-02-18 01:00:58,663 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 37 [2023-02-18 01:00:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:00:58,664 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2023-02-18 01:00:58,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 01:00:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2023-02-18 01:00:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 01:00:58,665 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:00:58,665 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:00:58,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 01:00:58,871 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,SelfDestructingSolverStorable9 [2023-02-18 01:00:58,871 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:00:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:00:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2023-02-18 01:00:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:00:58,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666339217] [2023-02-18 01:00:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:58,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:00:58,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:00:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078518199] [2023-02-18 01:00:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:00:58,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:00:58,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:00:58,881 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:00:58,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 01:00:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:00:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-18 01:00:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:00:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 01:00:59,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:00:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 01:00:59,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:00:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666339217] [2023-02-18 01:00:59,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:00:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078518199] [2023-02-18 01:00:59,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078518199] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:00:59,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:00:59,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-18 01:00:59,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936295545] [2023-02-18 01:00:59,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:00:59,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 01:00:59,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:00:59,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 01:00:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-18 01:00:59,737 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 01:01:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:01:05,571 INFO L93 Difference]: Finished difference Result 334 states and 463 transitions. [2023-02-18 01:01:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 01:01:05,571 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 49 [2023-02-18 01:01:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:01:05,573 INFO L225 Difference]: With dead ends: 334 [2023-02-18 01:01:05,573 INFO L226 Difference]: Without dead ends: 246 [2023-02-18 01:01:05,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 01:01:05,580 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 165 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-18 01:01:05,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 238 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-02-18 01:01:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-18 01:01:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 203. [2023-02-18 01:01:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 137 states have internal predecessors, (159), 55 states have call successors, (55), 13 states have call predecessors, (55), 13 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-18 01:01:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 268 transitions. [2023-02-18 01:01:05,668 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 268 transitions. Word has length 49 [2023-02-18 01:01:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:01:05,668 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 268 transitions. [2023-02-18 01:01:05,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 01:01:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 268 transitions. [2023-02-18 01:01:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 01:01:05,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:01:05,669 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:01:05,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 01:01:05,873 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,SelfDestructingSolverStorable10 [2023-02-18 01:01:05,873 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:01:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:01:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2023-02-18 01:01:05,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:01:05,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713793404] [2023-02-18 01:01:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:01:05,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:01:05,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:01:05,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730455739] [2023-02-18 01:01:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:01:05,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:01:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:01:05,883 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:01:05,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 01:01:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:01:05,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 01:01:05,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:01:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 01:01:06,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:01:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 01:01:06,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:01:06,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713793404] [2023-02-18 01:01:06,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:01:06,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730455739] [2023-02-18 01:01:06,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730455739] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:01:06,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:01:06,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-02-18 01:01:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661060758] [2023-02-18 01:01:06,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:01:06,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 01:01:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:01:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 01:01:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-02-18 01:01:06,773 INFO L87 Difference]: Start difference. First operand 203 states and 268 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 01:01:20,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:01:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:01:38,948 INFO L93 Difference]: Finished difference Result 327 states and 457 transitions. [2023-02-18 01:01:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 01:01:38,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 57 [2023-02-18 01:01:38,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:01:38,950 INFO L225 Difference]: With dead ends: 327 [2023-02-18 01:01:38,950 INFO L226 Difference]: Without dead ends: 325 [2023-02-18 01:01:38,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=671, Invalid=2988, Unknown=1, NotChecked=0, Total=3660 [2023-02-18 01:01:38,952 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 155 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 307 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2023-02-18 01:01:38,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 384 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1763 Invalid, 1 Unknown, 0 Unchecked, 16.6s Time] [2023-02-18 01:01:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-02-18 01:01:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 211. [2023-02-18 01:01:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 143 states have internal predecessors, (165), 55 states have call successors, (55), 15 states have call predecessors, (55), 15 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-18 01:01:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 274 transitions. [2023-02-18 01:01:39,031 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 274 transitions. Word has length 57 [2023-02-18 01:01:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:01:39,031 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 274 transitions. [2023-02-18 01:01:39,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 19 states have internal predecessors, (60), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-18 01:01:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 274 transitions. [2023-02-18 01:01:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 01:01:39,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:01:39,033 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:01:39,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 01:01:39,238 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,SelfDestructingSolverStorable11 [2023-02-18 01:01:39,238 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:01:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:01:39,239 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2023-02-18 01:01:39,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:01:39,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778873151] [2023-02-18 01:01:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:01:39,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:01:39,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:01:39,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17248716] [2023-02-18 01:01:39,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:01:39,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:01:39,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:01:39,250 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:01:39,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 01:01:39,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:01:39,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:01:39,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 01:01:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:01:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 01:01:39,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:01:39,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:01:39,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778873151] [2023-02-18 01:01:39,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:01:39,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17248716] [2023-02-18 01:01:39,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17248716] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:01:39,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:01:39,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 01:01:39,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121127511] [2023-02-18 01:01:39,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:01:39,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 01:01:39,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:01:39,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 01:01:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 01:01:39,313 INFO L87 Difference]: Start difference. First operand 211 states and 274 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 01:01:39,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:01:39,436 INFO L93 Difference]: Finished difference Result 383 states and 514 transitions. [2023-02-18 01:01:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 01:01:39,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2023-02-18 01:01:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:01:39,438 INFO L225 Difference]: With dead ends: 383 [2023-02-18 01:01:39,438 INFO L226 Difference]: Without dead ends: 253 [2023-02-18 01:01:39,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 01:01:39,439 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:01:39,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:01:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-18 01:01:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 244. [2023-02-18 01:01:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 157 states have internal predecessors, (182), 73 states have call successors, (73), 15 states have call predecessors, (73), 15 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-18 01:01:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 327 transitions. [2023-02-18 01:01:39,524 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 327 transitions. Word has length 62 [2023-02-18 01:01:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:01:39,525 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 327 transitions. [2023-02-18 01:01:39,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 01:01:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 327 transitions. [2023-02-18 01:01:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 01:01:39,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:01:39,526 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:01:39,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 01:01:39,726 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,SelfDestructingSolverStorable12 [2023-02-18 01:01:39,726 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:01:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:01:39,727 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2023-02-18 01:01:39,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:01:39,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407218164] [2023-02-18 01:01:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:01:39,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:01:39,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:01:39,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49241780] [2023-02-18 01:01:39,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 01:01:39,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:01:39,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:01:39,741 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:01:39,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 01:01:39,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 01:01:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:01:39,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-18 01:01:39,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:01:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 01:01:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:01:40,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:01:40,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407218164] [2023-02-18 01:01:40,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:01:40,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49241780] [2023-02-18 01:01:40,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49241780] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:01:40,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:01:40,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-18 01:01:40,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518841159] [2023-02-18 01:01:40,470 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:01:40,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 01:01:40,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:01:40,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 01:01:40,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-02-18 01:01:40,472 INFO L87 Difference]: Start difference. First operand 244 states and 327 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-18 01:01:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:01:41,101 INFO L93 Difference]: Finished difference Result 334 states and 452 transitions. [2023-02-18 01:01:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 01:01:41,102 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 62 [2023-02-18 01:01:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:01:41,105 INFO L225 Difference]: With dead ends: 334 [2023-02-18 01:01:41,105 INFO L226 Difference]: Without dead ends: 332 [2023-02-18 01:01:41,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-02-18 01:01:41,112 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 62 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 01:01:41,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 264 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 01:01:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-02-18 01:01:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 323. [2023-02-18 01:01:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 199 states have (on average 1.185929648241206) internal successors, (236), 200 states have internal predecessors, (236), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-02-18 01:01:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2023-02-18 01:01:41,260 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 62 [2023-02-18 01:01:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:01:41,260 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2023-02-18 01:01:41,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-18 01:01:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2023-02-18 01:01:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 01:01:41,262 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:01:41,262 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:01:41,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 01:01:41,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:01:41,467 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:01:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:01:41,468 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2023-02-18 01:01:41,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:01:41,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100213953] [2023-02-18 01:01:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:01:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:01:41,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:01:41,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676981062] [2023-02-18 01:01:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:01:41,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:01:41,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:01:41,476 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) [2023-02-18 01:01:41,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 01:01:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:01:41,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-18 01:01:41,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:01:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-02-18 01:01:41,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:01:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-18 01:01:45,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:01:45,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100213953] [2023-02-18 01:01:45,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:01:45,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676981062] [2023-02-18 01:01:45,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676981062] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:01:45,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:01:45,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-18 01:01:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397418923] [2023-02-18 01:01:45,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:01:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 01:01:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:01:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 01:01:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 01:01:45,796 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-18 01:02:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:02:05,952 INFO L93 Difference]: Finished difference Result 497 states and 697 transitions. [2023-02-18 01:02:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-18 01:02:05,952 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 76 [2023-02-18 01:02:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:02:05,956 INFO L225 Difference]: With dead ends: 497 [2023-02-18 01:02:05,956 INFO L226 Difference]: Without dead ends: 493 [2023-02-18 01:02:05,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1446, Invalid=6926, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 01:02:05,959 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 316 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2023-02-18 01:02:05,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 407 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2023-02-18 01:02:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-18 01:02:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 464. [2023-02-18 01:02:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 283 states have (on average 1.2084805653710247) internal successors, (342), 284 states have internal predecessors, (342), 155 states have call successors, (155), 25 states have call predecessors, (155), 25 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-02-18 01:02:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 651 transitions. [2023-02-18 01:02:06,264 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 651 transitions. Word has length 76 [2023-02-18 01:02:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:02:06,264 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 651 transitions. [2023-02-18 01:02:06,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-18 01:02:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 651 transitions. [2023-02-18 01:02:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 01:02:06,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:02:06,266 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:02:06,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 01:02:06,472 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,SelfDestructingSolverStorable14 [2023-02-18 01:02:06,473 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:02:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:02:06,473 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2023-02-18 01:02:06,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:02:06,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452331975] [2023-02-18 01:02:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:02:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:02:06,488 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:02:06,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622642061] [2023-02-18 01:02:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:02:06,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:02:06,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:02:06,490 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) [2023-02-18 01:02:06,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 01:02:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:02:06,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 01:02:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:02:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-18 01:02:06,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:02:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-02-18 01:02:06,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:02:06,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452331975] [2023-02-18 01:02:06,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:02:06,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622642061] [2023-02-18 01:02:06,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622642061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:02:06,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:02:06,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-18 01:02:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580235029] [2023-02-18 01:02:06,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:02:06,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 01:02:06,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:02:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 01:02:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-02-18 01:02:06,973 INFO L87 Difference]: Start difference. First operand 464 states and 651 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-18 01:02:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:02:09,449 INFO L93 Difference]: Finished difference Result 975 states and 1492 transitions. [2023-02-18 01:02:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 01:02:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2023-02-18 01:02:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:02:09,454 INFO L225 Difference]: With dead ends: 975 [2023-02-18 01:02:09,455 INFO L226 Difference]: Without dead ends: 973 [2023-02-18 01:02:09,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 01:02:09,456 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 139 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:02:09,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 458 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 01:02:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2023-02-18 01:02:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 887. [2023-02-18 01:02:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 451 states have (on average 1.29490022172949) internal successors, (584), 452 states have internal predecessors, (584), 407 states have call successors, (407), 28 states have call predecessors, (407), 28 states have return successors, (406), 406 states have call predecessors, (406), 406 states have call successors, (406) [2023-02-18 01:02:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1397 transitions. [2023-02-18 01:02:10,132 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1397 transitions. Word has length 79 [2023-02-18 01:02:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:02:10,132 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1397 transitions. [2023-02-18 01:02:10,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-02-18 01:02:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1397 transitions. [2023-02-18 01:02:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 01:02:10,134 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:02:10,134 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:02:10,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 01:02:10,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 01:02:10,341 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:02:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:02:10,342 INFO L85 PathProgramCache]: Analyzing trace with hash -248462013, now seen corresponding path program 1 times [2023-02-18 01:02:10,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:02:10,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381440156] [2023-02-18 01:02:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:02:10,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:02:10,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:02:10,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164902837] [2023-02-18 01:02:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:02:10,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:02:10,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:02:10,356 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) [2023-02-18 01:02:10,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 01:02:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:02:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 01:02:10,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:02:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-18 01:02:10,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:02:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-18 01:02:11,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:02:11,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381440156] [2023-02-18 01:02:11,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:02:11,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164902837] [2023-02-18 01:02:11,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164902837] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:02:11,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:02:11,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-02-18 01:02:11,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17321851] [2023-02-18 01:02:11,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:02:11,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 01:02:11,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:02:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 01:02:11,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-02-18 01:02:11,461 INFO L87 Difference]: Start difference. First operand 887 states and 1397 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-18 01:02:17,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:02:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:02:37,206 INFO L93 Difference]: Finished difference Result 1283 states and 2033 transitions. [2023-02-18 01:02:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 01:02:37,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 79 [2023-02-18 01:02:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:02:37,212 INFO L225 Difference]: With dead ends: 1283 [2023-02-18 01:02:37,212 INFO L226 Difference]: Without dead ends: 1281 [2023-02-18 01:02:37,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=815, Invalid=3217, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 01:02:37,215 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 185 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2023-02-18 01:02:37,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 521 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time] [2023-02-18 01:02:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2023-02-18 01:02:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1151. [2023-02-18 01:02:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 583 states have (on average 1.3018867924528301) internal successors, (759), 584 states have internal predecessors, (759), 535 states have call successors, (535), 32 states have call predecessors, (535), 32 states have return successors, (534), 534 states have call predecessors, (534), 534 states have call successors, (534) [2023-02-18 01:02:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1828 transitions. [2023-02-18 01:02:38,357 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1828 transitions. Word has length 79 [2023-02-18 01:02:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:02:38,357 INFO L495 AbstractCegarLoop]: Abstraction has 1151 states and 1828 transitions. [2023-02-18 01:02:38,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-18 01:02:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1828 transitions. [2023-02-18 01:02:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-18 01:02:38,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:02:38,364 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:02:38,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 01:02:38,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 01:02:38,568 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:02:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:02:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1959088841, now seen corresponding path program 2 times [2023-02-18 01:02:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:02:38,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917396733] [2023-02-18 01:02:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:02:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:02:38,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:02:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867201981] [2023-02-18 01:02:38,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:02:38,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:02:38,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:02:38,577 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) [2023-02-18 01:02:38,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 01:02:38,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:02:38,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:02:38,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 01:02:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:02:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 01:02:38,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:02:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 01:02:38,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:02:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917396733] [2023-02-18 01:02:38,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:02:38,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867201981] [2023-02-18 01:02:38,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867201981] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:02:38,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:02:38,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2023-02-18 01:02:38,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117288654] [2023-02-18 01:02:38,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:02:38,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 01:02:38,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:02:38,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 01:02:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-18 01:02:38,717 INFO L87 Difference]: Start difference. First operand 1151 states and 1828 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 01:02:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:02:40,241 INFO L93 Difference]: Finished difference Result 1322 states and 2089 transitions. [2023-02-18 01:02:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 01:02:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2023-02-18 01:02:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:02:40,248 INFO L225 Difference]: With dead ends: 1322 [2023-02-18 01:02:40,248 INFO L226 Difference]: Without dead ends: 1315 [2023-02-18 01:02:40,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 157 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2023-02-18 01:02:40,250 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 81 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 01:02:40,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 315 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 01:02:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2023-02-18 01:02:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1120. [2023-02-18 01:02:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 560 states have (on average 1.3089285714285714) internal successors, (733), 561 states have internal predecessors, (733), 527 states have call successors, (527), 32 states have call predecessors, (527), 32 states have return successors, (526), 526 states have call predecessors, (526), 526 states have call successors, (526) [2023-02-18 01:02:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1786 transitions. [2023-02-18 01:02:41,254 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1786 transitions. Word has length 84 [2023-02-18 01:02:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:02:41,254 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 1786 transitions. [2023-02-18 01:02:41,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 01:02:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1786 transitions. [2023-02-18 01:02:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 01:02:41,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:02:41,257 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:02:41,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 01:02:41,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 01:02:41,463 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:02:41,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:02:41,463 INFO L85 PathProgramCache]: Analyzing trace with hash -437420468, now seen corresponding path program 4 times [2023-02-18 01:02:41,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:02:41,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480935470] [2023-02-18 01:02:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:02:41,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:02:41,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:02:41,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066123687] [2023-02-18 01:02:41,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 01:02:41,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:02:41,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:02:41,472 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) [2023-02-18 01:02:41,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 01:02:41,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 01:02:41,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:02:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-18 01:02:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:02:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 52 proven. 51 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-02-18 01:02:41,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:02:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 44 proven. 38 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-18 01:02:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:02:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480935470] [2023-02-18 01:02:43,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:02:43,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066123687] [2023-02-18 01:02:43,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066123687] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:02:43,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:02:43,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2023-02-18 01:02:43,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15287130] [2023-02-18 01:02:43,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:02:43,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 01:02:43,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:02:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 01:02:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 01:02:43,262 INFO L87 Difference]: Start difference. First operand 1120 states and 1786 transitions. Second operand has 35 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-18 01:02:47,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:02:57,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:02:57,162 INFO L93 Difference]: Finished difference Result 1308 states and 2047 transitions. [2023-02-18 01:02:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 01:02:57,163 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 87 [2023-02-18 01:02:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:02:57,169 INFO L225 Difference]: With dead ends: 1308 [2023-02-18 01:02:57,169 INFO L226 Difference]: Without dead ends: 1306 [2023-02-18 01:02:57,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=703, Invalid=2837, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 01:02:57,171 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 320 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 423 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-02-18 01:02:57,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 331 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1465 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2023-02-18 01:02:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2023-02-18 01:02:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1282. [2023-02-18 01:02:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 653 states have (on average 1.2924961715160797) internal successors, (844), 657 states have internal predecessors, (844), 589 states have call successors, (589), 39 states have call predecessors, (589), 39 states have return successors, (588), 585 states have call predecessors, (588), 588 states have call successors, (588) [2023-02-18 01:02:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2021 transitions. [2023-02-18 01:02:58,401 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2021 transitions. Word has length 87 [2023-02-18 01:02:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:02:58,401 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 2021 transitions. [2023-02-18 01:02:58,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 10 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-18 01:02:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2021 transitions. [2023-02-18 01:02:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-18 01:02:58,403 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:02:58,404 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:02:58,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 01:02:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:02:58,609 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:02:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:02:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1810606754, now seen corresponding path program 2 times [2023-02-18 01:02:58,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:02:58,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991645346] [2023-02-18 01:02:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:02:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:02:58,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:02:58,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562576625] [2023-02-18 01:02:58,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:02:58,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:02:58,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:02:58,625 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) [2023-02-18 01:02:58,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 01:02:58,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:02:58,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:02:58,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-18 01:02:58,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:02:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 53 proven. 34 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-02-18 01:02:58,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:03:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-18 01:03:01,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:03:01,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991645346] [2023-02-18 01:03:01,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:03:01,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562576625] [2023-02-18 01:03:01,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562576625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:03:01,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:03:01,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-18 01:03:01,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789949098] [2023-02-18 01:03:01,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:03:01,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 01:03:01,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:03:01,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 01:03:01,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 01:03:01,585 INFO L87 Difference]: Start difference. First operand 1282 states and 2021 transitions. Second operand has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 11 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-18 01:03:09,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:03:32,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:03:35,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:03:41,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:03:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:03:52,269 INFO L93 Difference]: Finished difference Result 2110 states and 3330 transitions. [2023-02-18 01:03:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-18 01:03:52,270 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 11 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2023-02-18 01:03:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:03:52,277 INFO L225 Difference]: With dead ends: 2110 [2023-02-18 01:03:52,277 INFO L226 Difference]: Without dead ends: 1561 [2023-02-18 01:03:52,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2418 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=1676, Invalid=7254, Unknown=0, NotChecked=0, Total=8930 [2023-02-18 01:03:52,282 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 242 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 518 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 2785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:03:52,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 367 Invalid, 2785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 2265 Invalid, 2 Unknown, 0 Unchecked, 31.0s Time] [2023-02-18 01:03:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2023-02-18 01:03:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1468. [2023-02-18 01:03:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 753 states have (on average 1.2841965471447543) internal successors, (967), 758 states have internal predecessors, (967), 671 states have call successors, (671), 43 states have call predecessors, (671), 43 states have return successors, (670), 666 states have call predecessors, (670), 670 states have call successors, (670) [2023-02-18 01:03:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2308 transitions. [2023-02-18 01:03:53,926 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2308 transitions. Word has length 96 [2023-02-18 01:03:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:03:53,927 INFO L495 AbstractCegarLoop]: Abstraction has 1468 states and 2308 transitions. [2023-02-18 01:03:53,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 11 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-18 01:03:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2308 transitions. [2023-02-18 01:03:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-18 01:03:53,930 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:03:53,930 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:03:53,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 01:03:54,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:03:54,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:03:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:03:54,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1312648187, now seen corresponding path program 2 times [2023-02-18 01:03:54,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:03:54,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289020622] [2023-02-18 01:03:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:03:54,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:03:54,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:03:54,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779939429] [2023-02-18 01:03:54,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:03:54,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:03:54,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:03:54,145 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:03:54,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 01:03:54,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:03:54,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:03:54,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 01:03:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:03:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 29 proven. 46 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-02-18 01:03:54,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:03:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-02-18 01:03:55,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:03:55,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289020622] [2023-02-18 01:03:55,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:03:55,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779939429] [2023-02-18 01:03:55,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779939429] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:03:55,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:03:55,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-02-18 01:03:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039673186] [2023-02-18 01:03:55,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:03:55,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 01:03:55,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:03:55,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 01:03:55,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-02-18 01:03:55,183 INFO L87 Difference]: Start difference. First operand 1468 states and 2308 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2023-02-18 01:04:27,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:04:36,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:04:49,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:05:02,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:05:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:05:17,777 INFO L93 Difference]: Finished difference Result 1948 states and 3062 transitions. [2023-02-18 01:05:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-18 01:05:17,777 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 106 [2023-02-18 01:05:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:05:17,783 INFO L225 Difference]: With dead ends: 1948 [2023-02-18 01:05:17,783 INFO L226 Difference]: Without dead ends: 1946 [2023-02-18 01:05:17,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2760 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=1884, Invalid=7622, Unknown=0, NotChecked=0, Total=9506 [2023-02-18 01:05:17,787 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 314 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 794 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 4087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:05:17,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 893 Invalid, 4087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 3292 Invalid, 1 Unknown, 0 Unchecked, 56.2s Time] [2023-02-18 01:05:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2023-02-18 01:05:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1798. [2023-02-18 01:05:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 926 states have (on average 1.292656587473002) internal successors, (1197), 932 states have internal predecessors, (1197), 821 states have call successors, (821), 50 states have call predecessors, (821), 50 states have return successors, (820), 815 states have call predecessors, (820), 820 states have call successors, (820) [2023-02-18 01:05:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2838 transitions. [2023-02-18 01:05:20,230 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2838 transitions. Word has length 106 [2023-02-18 01:05:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:05:20,230 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2838 transitions. [2023-02-18 01:05:20,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2023-02-18 01:05:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2838 transitions. [2023-02-18 01:05:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-02-18 01:05:20,233 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:05:20,233 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:05:20,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 01:05:20,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:05:20,435 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:05:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:05:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash -744660668, now seen corresponding path program 3 times [2023-02-18 01:05:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:05:20,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880116582] [2023-02-18 01:05:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:05:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:05:20,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:05:20,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718588043] [2023-02-18 01:05:20,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 01:05:20,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:05:20,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:05:20,444 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:05:20,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 01:05:20,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 01:05:20,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:05:20,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-18 01:05:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:05:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 84 proven. 84 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-02-18 01:05:21,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:05:23,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:05:23,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880116582] [2023-02-18 01:05:23,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:05:23,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718588043] [2023-02-18 01:05:23,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718588043] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:05:23,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:05:23,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-02-18 01:05:23,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956551915] [2023-02-18 01:05:23,297 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:05:23,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 01:05:23,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:05:23,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 01:05:23,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2023-02-18 01:05:23,298 INFO L87 Difference]: Start difference. First operand 1798 states and 2838 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-02-18 01:05:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:05:28,370 INFO L93 Difference]: Finished difference Result 1949 states and 3056 transitions. [2023-02-18 01:05:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 01:05:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 114 [2023-02-18 01:05:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:05:28,379 INFO L225 Difference]: With dead ends: 1949 [2023-02-18 01:05:28,381 INFO L226 Difference]: Without dead ends: 1947 [2023-02-18 01:05:28,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 01:05:28,382 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 106 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-18 01:05:28,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 550 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-18 01:05:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2023-02-18 01:05:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1920. [2023-02-18 01:05:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 986 states have (on average 1.2920892494929006) internal successors, (1274), 992 states have internal predecessors, (1274), 877 states have call successors, (877), 56 states have call predecessors, (877), 56 states have return successors, (876), 871 states have call predecessors, (876), 876 states have call successors, (876) [2023-02-18 01:05:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 3027 transitions. [2023-02-18 01:05:31,067 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 3027 transitions. Word has length 114 [2023-02-18 01:05:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:05:31,069 INFO L495 AbstractCegarLoop]: Abstraction has 1920 states and 3027 transitions. [2023-02-18 01:05:31,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-02-18 01:05:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 3027 transitions. [2023-02-18 01:05:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-18 01:05:31,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:05:31,073 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:05:31,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 01:05:31,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:05:31,280 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:05:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:05:31,281 INFO L85 PathProgramCache]: Analyzing trace with hash 304105922, now seen corresponding path program 3 times [2023-02-18 01:05:31,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:05:31,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667783954] [2023-02-18 01:05:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:05:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:05:31,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:05:31,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983732567] [2023-02-18 01:05:31,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 01:05:31,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:05:31,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:05:31,293 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:05:31,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 01:05:31,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 01:05:31,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:05:31,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-18 01:05:31,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:05:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 88 proven. 42 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2023-02-18 01:05:31,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:05:33,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:05:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667783954] [2023-02-18 01:05:33,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:05:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983732567] [2023-02-18 01:05:33,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983732567] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:05:33,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:05:33,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 01:05:33,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17379597] [2023-02-18 01:05:33,126 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:05:33,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 01:05:33,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:05:33,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 01:05:33,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2023-02-18 01:05:33,127 INFO L87 Difference]: Start difference. First operand 1920 states and 3027 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 01:05:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:05:38,025 INFO L93 Difference]: Finished difference Result 2307 states and 3653 transitions. [2023-02-18 01:05:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 01:05:38,026 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 123 [2023-02-18 01:05:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:05:38,035 INFO L225 Difference]: With dead ends: 2307 [2023-02-18 01:05:38,035 INFO L226 Difference]: Without dead ends: 2300 [2023-02-18 01:05:38,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 01:05:38,037 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 86 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 01:05:38,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 336 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 01:05:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2023-02-18 01:05:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2279. [2023-02-18 01:05:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 1148 states have (on average 1.3022648083623694) internal successors, (1495), 1152 states have internal predecessors, (1495), 1065 states have call successors, (1065), 65 states have call predecessors, (1065), 65 states have return successors, (1064), 1061 states have call predecessors, (1064), 1064 states have call successors, (1064) [2023-02-18 01:05:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3624 transitions. [2023-02-18 01:05:41,127 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3624 transitions. Word has length 123 [2023-02-18 01:05:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:05:41,127 INFO L495 AbstractCegarLoop]: Abstraction has 2279 states and 3624 transitions. [2023-02-18 01:05:41,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-18 01:05:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3624 transitions. [2023-02-18 01:05:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-18 01:05:41,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:05:41,130 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:05:41,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 01:05:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:05:41,336 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:05:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:05:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash 702171882, now seen corresponding path program 4 times [2023-02-18 01:05:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:05:41,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997668462] [2023-02-18 01:05:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:05:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:05:41,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:05:41,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078612744] [2023-02-18 01:05:41,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 01:05:41,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:05:41,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:05:41,348 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:05:41,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 01:05:41,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 01:05:41,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:05:41,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-18 01:05:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:05:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-02-18 01:05:41,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:05:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 70 proven. 63 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-02-18 01:05:47,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:05:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997668462] [2023-02-18 01:05:47,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:05:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078612744] [2023-02-18 01:05:47,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078612744] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:05:47,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:05:47,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2023-02-18 01:05:47,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654477519] [2023-02-18 01:05:47,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:05:47,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 01:05:47,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:05:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 01:05:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 01:05:47,047 INFO L87 Difference]: Start difference. First operand 2279 states and 3624 transitions. Second operand has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2023-02-18 01:05:55,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:06:01,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:06:11,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:06:18,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:06:21,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:06:32,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:06:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:06:57,691 INFO L93 Difference]: Finished difference Result 2921 states and 4649 transitions. [2023-02-18 01:06:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-18 01:06:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 123 [2023-02-18 01:06:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:06:57,702 INFO L225 Difference]: With dead ends: 2921 [2023-02-18 01:06:57,702 INFO L226 Difference]: Without dead ends: 2913 [2023-02-18 01:06:57,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4566 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=2528, Invalid=12724, Unknown=0, NotChecked=0, Total=15252 [2023-02-18 01:06:57,704 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 346 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 3883 mSolverCounterSat, 1023 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 4912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1023 IncrementalHoareTripleChecker+Valid, 3883 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:06:57,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 548 Invalid, 4912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1023 Valid, 3883 Invalid, 6 Unknown, 0 Unchecked, 46.2s Time] [2023-02-18 01:06:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2023-02-18 01:07:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2592. [2023-02-18 01:07:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 1311 states have (on average 1.3012967200610221) internal successors, (1706), 1316 states have internal predecessors, (1706), 1211 states have call successors, (1211), 69 states have call predecessors, (1211), 69 states have return successors, (1210), 1206 states have call predecessors, (1210), 1210 states have call successors, (1210) [2023-02-18 01:07:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 4127 transitions. [2023-02-18 01:07:02,167 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 4127 transitions. Word has length 123 [2023-02-18 01:07:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:07:02,168 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 4127 transitions. [2023-02-18 01:07:02,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2023-02-18 01:07:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 4127 transitions. [2023-02-18 01:07:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-18 01:07:02,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:07:02,171 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:07:02,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 01:07:02,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:07:02,384 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:07:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:07:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1890512647, now seen corresponding path program 5 times [2023-02-18 01:07:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:07:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310300581] [2023-02-18 01:07:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:07:02,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:07:02,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:07:02,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661646343] [2023-02-18 01:07:02,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 01:07:02,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:07:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:07:02,392 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:07:02,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 01:07:02,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 01:07:02,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:07:02,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 113 conjunts are in the unsatisfiable core [2023-02-18 01:07:02,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:07:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 54 proven. 134 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-02-18 01:07:02,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:07:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 93 proven. 82 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2023-02-18 01:07:12,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:07:12,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310300581] [2023-02-18 01:07:12,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:07:12,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661646343] [2023-02-18 01:07:12,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661646343] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:07:12,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:07:12,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 37 [2023-02-18 01:07:12,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661593088] [2023-02-18 01:07:12,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:07:12,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 01:07:12,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:07:12,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 01:07:12,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 01:07:12,251 INFO L87 Difference]: Start difference. First operand 2592 states and 4127 transitions. Second operand has 37 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 14 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 10 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 01:07:17,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:07:26,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:07:32,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:08:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:08:24,345 INFO L93 Difference]: Finished difference Result 2834 states and 4475 transitions. [2023-02-18 01:08:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-02-18 01:08:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 14 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 10 states have call predecessors, (36), 12 states have call successors, (36) Word has length 128 [2023-02-18 01:08:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:08:24,357 INFO L225 Difference]: With dead ends: 2834 [2023-02-18 01:08:24,357 INFO L226 Difference]: Without dead ends: 2826 [2023-02-18 01:08:24,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 236 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3524 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=1739, Invalid=10470, Unknown=1, NotChecked=0, Total=12210 [2023-02-18 01:08:24,359 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 341 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 3931 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 4693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 3931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:08:24,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 628 Invalid, 4693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 3931 Invalid, 0 Unknown, 0 Unchecked, 37.2s Time] [2023-02-18 01:08:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2023-02-18 01:08:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2771. [2023-02-18 01:08:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 1408 states have (on average 1.3004261363636365) internal successors, (1831), 1413 states have internal predecessors, (1831), 1287 states have call successors, (1287), 75 states have call predecessors, (1287), 75 states have return successors, (1286), 1282 states have call predecessors, (1286), 1286 states have call successors, (1286) [2023-02-18 01:08:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4404 transitions. [2023-02-18 01:08:29,348 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4404 transitions. Word has length 128 [2023-02-18 01:08:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:08:29,349 INFO L495 AbstractCegarLoop]: Abstraction has 2771 states and 4404 transitions. [2023-02-18 01:08:29,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 14 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 10 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 01:08:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4404 transitions. [2023-02-18 01:08:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-18 01:08:29,352 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:08:29,353 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:08:29,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 01:08:29,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-18 01:08:29,561 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:08:29,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:08:29,562 INFO L85 PathProgramCache]: Analyzing trace with hash 844715275, now seen corresponding path program 6 times [2023-02-18 01:08:29,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:08:29,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444533013] [2023-02-18 01:08:29,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:08:29,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:08:29,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:08:29,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375305500] [2023-02-18 01:08:29,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 01:08:29,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:08:29,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:08:29,569 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:08:29,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 01:08:31,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 01:08:31,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:08:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-18 01:08:31,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:08:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 69 proven. 129 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2023-02-18 01:08:32,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:08:49,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:08:49,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444533013] [2023-02-18 01:08:49,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:08:49,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375305500] [2023-02-18 01:08:49,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375305500] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:08:49,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:08:49,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 01:08:49,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719767768] [2023-02-18 01:08:49,828 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:08:49,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 01:08:49,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:08:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 01:08:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1436, Unknown=3, NotChecked=0, Total=1640 [2023-02-18 01:08:49,829 INFO L87 Difference]: Start difference. First operand 2771 states and 4404 transitions. Second operand has 27 states, 25 states have (on average 1.92) internal successors, (48), 23 states have internal predecessors, (48), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2023-02-18 01:09:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:09:02,873 INFO L93 Difference]: Finished difference Result 3104 states and 4894 transitions. [2023-02-18 01:09:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 01:09:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 23 states have internal predecessors, (48), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 131 [2023-02-18 01:09:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:09:02,886 INFO L225 Difference]: With dead ends: 3104 [2023-02-18 01:09:02,886 INFO L226 Difference]: Without dead ends: 3097 [2023-02-18 01:09:02,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=381, Invalid=2696, Unknown=3, NotChecked=0, Total=3080 [2023-02-18 01:09:02,888 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 103 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-18 01:09:02,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 478 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-02-18 01:09:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2023-02-18 01:09:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 2989. [2023-02-18 01:09:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 1518 states have (on average 1.2990777338603425) internal successors, (1972), 1523 states have internal predecessors, (1972), 1387 states have call successors, (1387), 83 states have call predecessors, (1387), 83 states have return successors, (1386), 1382 states have call predecessors, (1386), 1386 states have call successors, (1386) [2023-02-18 01:09:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 4745 transitions. [2023-02-18 01:09:08,424 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 4745 transitions. Word has length 131 [2023-02-18 01:09:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:09:08,424 INFO L495 AbstractCegarLoop]: Abstraction has 2989 states and 4745 transitions. [2023-02-18 01:09:08,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 23 states have internal predecessors, (48), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2023-02-18 01:09:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 4745 transitions. [2023-02-18 01:09:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-18 01:09:08,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:09:08,429 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:09:08,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 01:09:08,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 01:09:08,640 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:09:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:09:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash -648253247, now seen corresponding path program 7 times [2023-02-18 01:09:08,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:09:08,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423531643] [2023-02-18 01:09:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:09:08,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:09:08,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:09:08,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106944623] [2023-02-18 01:09:08,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 01:09:08,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:09:08,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:09:08,649 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:09:08,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 01:09:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:09:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 114 conjunts are in the unsatisfiable core [2023-02-18 01:09:08,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:09:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 70 proven. 94 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-02-18 01:09:09,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:09:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 70 proven. 91 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-02-18 01:09:11,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:09:11,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423531643] [2023-02-18 01:09:11,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:09:11,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106944623] [2023-02-18 01:09:11,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106944623] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:09:11,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:09:11,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 44 [2023-02-18 01:09:11,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924093598] [2023-02-18 01:09:11,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:09:11,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 01:09:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:09:11,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 01:09:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1599, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 01:09:11,602 INFO L87 Difference]: Start difference. First operand 2989 states and 4745 transitions. Second operand has 44 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2023-02-18 01:09:16,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:25,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:26,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:31,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:33,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:35,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:42,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:44,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:50,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:52,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:09:55,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:10:00,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:10:21,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:10:25,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:10:34,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:10:39,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:10:42,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:10:44,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:10:54,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:11:07,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:11:10,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:11:22,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:11:24,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:11:26,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:11:28,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:11:31,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:11:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:11:53,488 INFO L93 Difference]: Finished difference Result 3309 states and 5171 transitions. [2023-02-18 01:11:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-18 01:11:53,489 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 131 [2023-02-18 01:11:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:11:53,501 INFO L225 Difference]: With dead ends: 3309 [2023-02-18 01:11:53,501 INFO L226 Difference]: Without dead ends: 3304 [2023-02-18 01:11:53,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5353 ImplicationChecksByTransitivity, 69.1s TimeCoverageRelationStatistics Valid=3308, Invalid=15318, Unknown=6, NotChecked=0, Total=18632 [2023-02-18 01:11:53,504 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 639 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 4230 mSolverCounterSat, 1259 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 5506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1259 IncrementalHoareTripleChecker+Valid, 4230 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.9s IncrementalHoareTripleChecker+Time [2023-02-18 01:11:53,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 641 Invalid, 5506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1259 Valid, 4230 Invalid, 17 Unknown, 0 Unchecked, 85.9s Time] [2023-02-18 01:11:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2023-02-18 01:12:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 3025. [2023-02-18 01:12:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 1530 states have (on average 1.3013071895424837) internal successors, (1991), 1535 states have internal predecessors, (1991), 1407 states have call successors, (1407), 87 states have call predecessors, (1407), 87 states have return successors, (1406), 1402 states have call predecessors, (1406), 1406 states have call successors, (1406) [2023-02-18 01:12:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4804 transitions. [2023-02-18 01:12:02,077 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4804 transitions. Word has length 131 [2023-02-18 01:12:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:12:02,078 INFO L495 AbstractCegarLoop]: Abstraction has 3025 states and 4804 transitions. [2023-02-18 01:12:02,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2023-02-18 01:12:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4804 transitions. [2023-02-18 01:12:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-02-18 01:12:02,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:12:02,082 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:12:02,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 01:12:02,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 01:12:02,288 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:12:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:12:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash 508043842, now seen corresponding path program 8 times [2023-02-18 01:12:02,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:12:02,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741551879] [2023-02-18 01:12:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:12:02,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:12:02,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:12:02,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089060664] [2023-02-18 01:12:02,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:12:02,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:12:02,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:12:02,301 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:12:02,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 01:12:02,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:12:02,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:12:02,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-18 01:12:02,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:12:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 93 proven. 76 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2023-02-18 01:12:02,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:12:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 90 proven. 76 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2023-02-18 01:12:08,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:12:08,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741551879] [2023-02-18 01:12:08,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:12:08,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089060664] [2023-02-18 01:12:08,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089060664] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:12:08,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:12:08,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2023-02-18 01:12:08,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463914948] [2023-02-18 01:12:08,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:12:08,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 01:12:08,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:12:08,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 01:12:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 01:12:08,994 INFO L87 Difference]: Start difference. First operand 3025 states and 4804 transitions. Second operand has 37 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 13 states have call successors, (43) [2023-02-18 01:12:22,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:12:55,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:13:02,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:13:14,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:13:27,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:13:36,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:13:38,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:13:50,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:13:52,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:13:56,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 01:14:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:14:00,224 INFO L93 Difference]: Finished difference Result 3540 states and 5629 transitions. [2023-02-18 01:14:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-02-18 01:14:00,224 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 13 states have call successors, (43) Word has length 140 [2023-02-18 01:14:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:14:00,234 INFO L225 Difference]: With dead ends: 3540 [2023-02-18 01:14:00,234 INFO L226 Difference]: Without dead ends: 3532 [2023-02-18 01:14:00,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6388 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=3190, Invalid=15992, Unknown=0, NotChecked=0, Total=19182 [2023-02-18 01:14:00,237 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 319 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 4051 mSolverCounterSat, 967 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 5025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 4051 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.4s IncrementalHoareTripleChecker+Time [2023-02-18 01:14:00,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 617 Invalid, 5025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [967 Valid, 4051 Invalid, 7 Unknown, 0 Unchecked, 69.4s Time] [2023-02-18 01:14:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2023-02-18 01:14:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 3381. [2023-02-18 01:14:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 1708 states have (on average 1.303864168618267) internal successors, (2227), 1713 states have internal predecessors, (2227), 1579 states have call successors, (1579), 93 states have call predecessors, (1579), 93 states have return successors, (1578), 1574 states have call predecessors, (1578), 1578 states have call successors, (1578) [2023-02-18 01:14:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 5384 transitions. [2023-02-18 01:14:10,350 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 5384 transitions. Word has length 140 [2023-02-18 01:14:10,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:14:10,351 INFO L495 AbstractCegarLoop]: Abstraction has 3381 states and 5384 transitions. [2023-02-18 01:14:10,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 15 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 13 states have call successors, (43) [2023-02-18 01:14:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 5384 transitions. [2023-02-18 01:14:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-02-18 01:14:10,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:14:10,355 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:14:10,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 01:14:10,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 01:14:10,562 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:14:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:14:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1937312446, now seen corresponding path program 9 times [2023-02-18 01:14:10,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:14:10,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593234067] [2023-02-18 01:14:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:14:10,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:14:10,572 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:14:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396718677] [2023-02-18 01:14:10,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 01:14:10,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:14:10,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:14:10,574 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:14:10,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 01:14:11,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 01:14:11,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:14:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 113 conjunts are in the unsatisfiable core [2023-02-18 01:14:11,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:14:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 78 proven. 146 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2023-02-18 01:14:12,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:14:22,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:14:22,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593234067] [2023-02-18 01:14:22,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:14:22,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396718677] [2023-02-18 01:14:22,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396718677] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:14:22,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:14:22,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-02-18 01:14:22,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882283825] [2023-02-18 01:14:22,621 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:14:22,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 01:14:22,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:14:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 01:14:22,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 01:14:22,623 INFO L87 Difference]: Start difference. First operand 3381 states and 5384 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 01:14:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:14:38,599 INFO L93 Difference]: Finished difference Result 3879 states and 6191 transitions. [2023-02-18 01:14:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 01:14:38,599 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 136 [2023-02-18 01:14:38,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:14:38,610 INFO L225 Difference]: With dead ends: 3879 [2023-02-18 01:14:38,611 INFO L226 Difference]: Without dead ends: 3876 [2023-02-18 01:14:38,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=294, Invalid=2462, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 01:14:38,613 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 103 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:14:38,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 598 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 01:14:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2023-02-18 01:14:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 3593. [2023-02-18 01:14:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 1802 states have (on average 1.306881243063263) internal successors, (2355), 1805 states have internal predecessors, (2355), 1691 states have call successors, (1691), 99 states have call predecessors, (1691), 99 states have return successors, (1690), 1688 states have call predecessors, (1690), 1690 states have call successors, (1690) [2023-02-18 01:14:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5736 transitions. [2023-02-18 01:14:49,307 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5736 transitions. Word has length 136 [2023-02-18 01:14:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:14:49,308 INFO L495 AbstractCegarLoop]: Abstraction has 3593 states and 5736 transitions. [2023-02-18 01:14:49,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 01:14:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5736 transitions. [2023-02-18 01:14:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-02-18 01:14:49,312 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:14:49,312 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:14:49,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 01:14:49,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 01:14:49,520 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:14:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:14:49,520 INFO L85 PathProgramCache]: Analyzing trace with hash -135793191, now seen corresponding path program 10 times [2023-02-18 01:14:49,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:14:49,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3454221] [2023-02-18 01:14:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:14:49,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:14:49,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:14:49,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310987100] [2023-02-18 01:14:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 01:14:49,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:14:49,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:14:49,532 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:14:49,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 01:14:49,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 01:14:49,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:14:49,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 01:14:49,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:14:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 352 proven. 18 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-02-18 01:14:49,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:14:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 104 proven. 18 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2023-02-18 01:14:49,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:14:49,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3454221] [2023-02-18 01:14:49,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:14:49,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310987100] [2023-02-18 01:14:49,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310987100] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:14:49,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:14:49,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2023-02-18 01:14:49,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848026734] [2023-02-18 01:14:49,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:14:49,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 01:14:49,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:14:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 01:14:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-18 01:14:49,657 INFO L87 Difference]: Start difference. First operand 3593 states and 5736 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-02-18 01:15:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:15:01,582 INFO L93 Difference]: Finished difference Result 6102 states and 9744 transitions. [2023-02-18 01:15:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 01:15:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 148 [2023-02-18 01:15:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:15:01,598 INFO L225 Difference]: With dead ends: 6102 [2023-02-18 01:15:01,598 INFO L226 Difference]: Without dead ends: 4070 [2023-02-18 01:15:01,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-18 01:15:01,607 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:15:01,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 191 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:15:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states.