./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 17:16:05,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 17:16:05,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 17:16:05,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 17:16:05,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 17:16:05,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 17:16:05,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 17:16:05,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 17:16:05,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 17:16:05,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 17:16:05,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 17:16:05,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 17:16:05,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 17:16:05,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 17:16:05,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 17:16:05,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 17:16:05,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 17:16:05,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 17:16:05,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 17:16:05,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 17:16:05,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 17:16:05,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 17:16:05,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 17:16:05,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 17:16:05,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 17:16:05,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 17:16:05,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 17:16:05,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 17:16:05,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 17:16:05,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 17:16:05,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 17:16:05,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 17:16:05,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 17:16:05,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 17:16:05,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 17:16:05,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 17:16:05,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 17:16:05,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 17:16:05,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 17:16:05,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 17:16:05,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 17:16:05,149 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 17:16:05,162 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 17:16:05,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 17:16:05,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 17:16:05,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 17:16:05,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 17:16:05,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 17:16:05,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 17:16:05,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 17:16:05,164 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 17:16:05,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 17:16:05,164 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 17:16:05,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 17:16:05,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 17:16:05,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 17:16:05,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 17:16:05,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 17:16:05,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 17:16:05,165 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 17:16:05,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 17:16:05,165 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 17:16:05,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 17:16:05,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 17:16:05,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 17:16:05,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 17:16:05,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:16:05,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 17:16:05,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 17:16:05,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 17:16:05,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 17:16:05,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 17:16:05,167 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 17:16:05,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 17:16:05,167 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 17:16:05,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 17:16:05,167 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 17:16:05,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2023-02-18 17:16:05,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 17:16:05,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 17:16:05,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 17:16:05,342 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 17:16:05,342 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 17:16:05,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-02-18 17:16:06,312 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 17:16:06,497 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 17:16:06,498 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-02-18 17:16:06,503 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48185d252/eb7b0111576d4b03807ba1449fc47102/FLAG95a537f82 [2023-02-18 17:16:06,515 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48185d252/eb7b0111576d4b03807ba1449fc47102 [2023-02-18 17:16:06,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 17:16:06,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 17:16:06,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 17:16:06,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 17:16:06,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 17:16:06,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a2b96b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06, skipping insertion in model container [2023-02-18 17:16:06,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 17:16:06,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 17:16:06,649 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2023-02-18 17:16:06,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:16:06,682 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 17:16:06,691 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2023-02-18 17:16:06,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:16:06,706 INFO L208 MainTranslator]: Completed translation [2023-02-18 17:16:06,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06 WrapperNode [2023-02-18 17:16:06,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 17:16:06,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 17:16:06,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 17:16:06,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 17:16:06,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,736 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-18 17:16:06,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 17:16:06,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 17:16:06,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 17:16:06,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 17:16:06,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 17:16:06,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 17:16:06,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 17:16:06,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 17:16:06,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (1/1) ... [2023-02-18 17:16:06,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:16:06,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:06,779 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 17:16:06,797 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 17:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 17:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 17:16:06,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 17:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 17:16:06,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 17:16:06,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 17:16:06,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 17:16:06,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 17:16:06,862 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 17:16:06,864 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 17:16:06,979 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 17:16:06,983 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 17:16:06,983 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 17:16:06,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:16:06 BoogieIcfgContainer [2023-02-18 17:16:06,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 17:16:06,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 17:16:06,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 17:16:06,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 17:16:06,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:16:06" (1/3) ... [2023-02-18 17:16:06,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5573d336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:16:06, skipping insertion in model container [2023-02-18 17:16:06,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:16:06" (2/3) ... [2023-02-18 17:16:06,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5573d336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:16:06, skipping insertion in model container [2023-02-18 17:16:06,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:16:06" (3/3) ... [2023-02-18 17:16:06,989 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2023-02-18 17:16:06,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 17:16:06,999 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 17:16:07,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 17:16:07,031 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;@4a8a82f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 17:16:07,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 17:16:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 17:16:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 17:16:07,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:07,044 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:16:07,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2023-02-18 17:16:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:07,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241894124] [2023-02-18 17:16:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:07,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:07,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:07,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241894124] [2023-02-18 17:16:07,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 17:16:07,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22854502] [2023-02-18 17:16:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:07,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:07,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:07,186 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 17:16:07,188 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 17:16:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:07,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 17:16:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 17:16:07,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:16:07,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22854502] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:16:07,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:16:07,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 17:16:07,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599230100] [2023-02-18 17:16:07,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:16:07,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 17:16:07,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 17:16:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:16:07,306 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:16:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:07,322 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2023-02-18 17:16:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 17:16:07,324 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-02-18 17:16:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:07,331 INFO L225 Difference]: With dead ends: 67 [2023-02-18 17:16:07,332 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 17:16:07,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 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 17:16:07,341 INFO L413 NwaCegarLoop]: 46 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, 46 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 17:16:07,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:16:07,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 17:16:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 17:16:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 17:16:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-02-18 17:16:07,377 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2023-02-18 17:16:07,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:07,378 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-02-18 17:16:07,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:16:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-02-18 17:16:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 17:16:07,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:07,382 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 17:16:07,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 17:16:07,586 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 17:16:07,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2023-02-18 17:16:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:07,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690324408] [2023-02-18 17:16:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:07,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:07,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:07,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329601400] [2023-02-18 17:16:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:07,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:07,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:07,621 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 17:16:07,624 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 17:16:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:07,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:16:07,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 17:16:07,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 17:16:07,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:07,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690324408] [2023-02-18 17:16:07,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:07,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329601400] [2023-02-18 17:16:07,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329601400] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:16:07,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:16:07,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-18 17:16:07,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060682432] [2023-02-18 17:16:07,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:07,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:16:07,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:07,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:16:07,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 17:16:07,832 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:16:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:07,935 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-02-18 17:16:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:16:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-02-18 17:16:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:07,936 INFO L225 Difference]: With dead ends: 48 [2023-02-18 17:16:07,936 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 17:16:07,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:16:07,938 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:07,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:16:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 17:16:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-18 17:16:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 17:16:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-18 17:16:07,944 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2023-02-18 17:16:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:07,945 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-18 17:16:07,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 17:16:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-18 17:16:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 17:16:07,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:07,946 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 17:16:07,958 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 17:16:08,146 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 17:16:08,147 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2023-02-18 17:16:08,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:08,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269058943] [2023-02-18 17:16:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:08,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:08,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:08,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281108163] [2023-02-18 17:16:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:08,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:08,169 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 17:16:08,170 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 17:16:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:08,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:16:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 17:16:08,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:16:08,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269058943] [2023-02-18 17:16:08,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:08,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281108163] [2023-02-18 17:16:08,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281108163] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:16:08,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:16:08,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-18 17:16:08,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28152995] [2023-02-18 17:16:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:16:08,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:16:08,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:16:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:16:08,288 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 17:16:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:08,320 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-18 17:16:08,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:16:08,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-18 17:16:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:08,321 INFO L225 Difference]: With dead ends: 39 [2023-02-18 17:16:08,321 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 17:16:08,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:16:08,322 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:08,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:16:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 17:16:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-18 17:16:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 17:16:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-18 17:16:08,328 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2023-02-18 17:16:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:08,329 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-18 17:16:08,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 17:16:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-18 17:16:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 17:16:08,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:08,330 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 17:16:08,336 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 17:16:08,534 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 17:16:08,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2023-02-18 17:16:08,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:08,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737584412] [2023-02-18 17:16:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:08,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:08,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:08,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996507596] [2023-02-18 17:16:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:08,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:08,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:08,550 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 17:16:08,551 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 17:16:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:08,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 17:16:08,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 17:16:08,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:16:08,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:08,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737584412] [2023-02-18 17:16:08,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:08,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996507596] [2023-02-18 17:16:08,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996507596] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:16:08,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:16:08,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-18 17:16:08,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847609227] [2023-02-18 17:16:08,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:16:08,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:16:08,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:08,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:16:08,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:16:08,748 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 17:16:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:08,792 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-02-18 17:16:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:16:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-02-18 17:16:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:08,793 INFO L225 Difference]: With dead ends: 50 [2023-02-18 17:16:08,794 INFO L226 Difference]: Without dead ends: 48 [2023-02-18 17:16:08,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:16:08,795 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:08,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:16:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-18 17:16:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-18 17:16:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 17:16:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-02-18 17:16:08,802 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2023-02-18 17:16:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:08,803 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-18 17:16:08,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 17:16:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-02-18 17:16:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 17:16:08,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:08,804 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:16:08,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 17:16:09,009 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 17:16:09,009 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2023-02-18 17:16:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:09,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129444512] [2023-02-18 17:16:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:09,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:09,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:09,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921346108] [2023-02-18 17:16:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:09,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:09,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:09,022 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 17:16:09,024 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 17:16:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:09,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 17:16:09,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-18 17:16:09,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:09,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:09,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129444512] [2023-02-18 17:16:09,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:09,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921346108] [2023-02-18 17:16:09,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921346108] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:16:09,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:16:09,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-18 17:16:09,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861581943] [2023-02-18 17:16:09,127 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:09,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:16:09,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:16:09,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:16:09,128 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 17:16:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:09,192 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-02-18 17:16:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 17:16:09,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-18 17:16:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:09,194 INFO L225 Difference]: With dead ends: 54 [2023-02-18 17:16:09,194 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 17:16:09,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:16:09,195 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:09,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:16:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 17:16:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-18 17:16:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 17:16:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-02-18 17:16:09,202 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2023-02-18 17:16:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:09,202 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-02-18 17:16:09,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 17:16:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-02-18 17:16:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 17:16:09,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:09,203 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:16:09,213 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 17:16:09,408 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 17:16:09,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:09,409 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2023-02-18 17:16:09,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:09,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236884947] [2023-02-18 17:16:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:09,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:09,419 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:09,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318794054] [2023-02-18 17:16:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:09,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:09,424 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 17:16:09,425 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 17:16:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:09,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 17:16:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 17:16:09,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:09,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:09,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236884947] [2023-02-18 17:16:09,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:09,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318794054] [2023-02-18 17:16:09,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318794054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:16:09,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:16:09,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-18 17:16:09,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66897647] [2023-02-18 17:16:09,560 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:09,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 17:16:09,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:09,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 17:16:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:16:09,561 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 17:16:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:09,651 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2023-02-18 17:16:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 17:16:09,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-02-18 17:16:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:09,654 INFO L225 Difference]: With dead ends: 58 [2023-02-18 17:16:09,654 INFO L226 Difference]: Without dead ends: 56 [2023-02-18 17:16:09,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:16:09,655 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:09,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 118 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:16:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-18 17:16:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-02-18 17:16:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 17:16:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-18 17:16:09,673 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2023-02-18 17:16:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:09,674 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-18 17:16:09,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 17:16:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-18 17:16:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 17:16:09,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:09,677 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:16:09,681 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 17:16:09,881 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 17:16:09,881 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2023-02-18 17:16:09,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:09,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853686529] [2023-02-18 17:16:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:09,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:09,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:09,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562135600] [2023-02-18 17:16:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:09,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:09,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:09,894 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 17:16:09,896 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 17:16:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:09,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 17:16:09,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-18 17:16:09,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-18 17:16:09,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:09,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853686529] [2023-02-18 17:16:09,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562135600] [2023-02-18 17:16:09,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562135600] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:16:09,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:16:09,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-18 17:16:09,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831784040] [2023-02-18 17:16:09,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:09,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 17:16:09,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 17:16:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 17:16:09,998 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 17:16:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:10,107 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2023-02-18 17:16:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 17:16:10,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2023-02-18 17:16:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:10,109 INFO L225 Difference]: With dead ends: 102 [2023-02-18 17:16:10,109 INFO L226 Difference]: Without dead ends: 94 [2023-02-18 17:16:10,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:16:10,109 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:10,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 195 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:16:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-18 17:16:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-18 17:16:10,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-18 17:16:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2023-02-18 17:16:10,120 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2023-02-18 17:16:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:10,120 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2023-02-18 17:16:10,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 17:16:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2023-02-18 17:16:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 17:16:10,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:10,121 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:16:10,131 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 17:16:10,325 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 17:16:10,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:10,326 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2023-02-18 17:16:10,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:10,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647435232] [2023-02-18 17:16:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:10,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:10,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:10,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675684056] [2023-02-18 17:16:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:10,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:10,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:10,335 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 17:16:10,374 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 17:16:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:10,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 17:16:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-18 17:16:10,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-18 17:16:10,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647435232] [2023-02-18 17:16:10,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675684056] [2023-02-18 17:16:10,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675684056] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:16:10,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:16:10,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-18 17:16:10,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982313239] [2023-02-18 17:16:10,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:10,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 17:16:10,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:10,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 17:16:10,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:16:10,462 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-18 17:16:10,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:10,669 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2023-02-18 17:16:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 17:16:10,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 71 [2023-02-18 17:16:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:10,672 INFO L225 Difference]: With dead ends: 128 [2023-02-18 17:16:10,672 INFO L226 Difference]: Without dead ends: 124 [2023-02-18 17:16:10,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-18 17:16:10,673 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 26 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:10,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 174 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 17:16:10,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-18 17:16:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2023-02-18 17:16:10,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 17:16:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-02-18 17:16:10,686 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2023-02-18 17:16:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:10,686 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-02-18 17:16:10,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-18 17:16:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-02-18 17:16:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 17:16:10,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:10,688 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:16:10,692 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 17:16:10,892 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 17:16:10,893 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:10,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:10,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2023-02-18 17:16:10,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:10,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967643530] [2023-02-18 17:16:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:10,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:10,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:10,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153495375] [2023-02-18 17:16:10,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:16:10,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:10,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:10,903 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 17:16:10,905 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 17:16:10,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:16:10,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:16:10,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 17:16:10,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-18 17:16:11,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 17:16:11,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:11,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967643530] [2023-02-18 17:16:11,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:11,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153495375] [2023-02-18 17:16:11,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153495375] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:16:11,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:16:11,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2023-02-18 17:16:11,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484228118] [2023-02-18 17:16:11,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:11,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 17:16:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:11,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 17:16:11,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-02-18 17:16:11,187 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2023-02-18 17:16:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:12,768 INFO L93 Difference]: Finished difference Result 134 states and 181 transitions. [2023-02-18 17:16:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 17:16:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 76 [2023-02-18 17:16:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:12,770 INFO L225 Difference]: With dead ends: 134 [2023-02-18 17:16:12,770 INFO L226 Difference]: Without dead ends: 132 [2023-02-18 17:16:12,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 17:16:12,771 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:12,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 160 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 17:16:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-18 17:16:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 113. [2023-02-18 17:16:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.171875) internal successors, (75), 66 states have internal predecessors, (75), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-18 17:16:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2023-02-18 17:16:12,794 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 76 [2023-02-18 17:16:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:12,795 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2023-02-18 17:16:12,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2023-02-18 17:16:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2023-02-18 17:16:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-18 17:16:12,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:12,796 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:16:12,801 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 17:16:13,001 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 17:16:13,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:13,001 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2023-02-18 17:16:13,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:13,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047893814] [2023-02-18 17:16:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:13,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:13,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:13,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368584341] [2023-02-18 17:16:13,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:16:13,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:13,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:13,021 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 17:16:13,043 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 17:16:13,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 17:16:13,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:16:13,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 17:16:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-02-18 17:16:13,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:13,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:13,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047893814] [2023-02-18 17:16:13,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:13,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368584341] [2023-02-18 17:16:13,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368584341] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:16:13,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:16:13,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-02-18 17:16:13,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569247267] [2023-02-18 17:16:13,199 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:13,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:16:13,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:13,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:16:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-02-18 17:16:13,200 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-18 17:16:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:13,663 INFO L93 Difference]: Finished difference Result 145 states and 189 transitions. [2023-02-18 17:16:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 17:16:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2023-02-18 17:16:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:13,664 INFO L225 Difference]: With dead ends: 145 [2023-02-18 17:16:13,664 INFO L226 Difference]: Without dead ends: 143 [2023-02-18 17:16:13,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-02-18 17:16:13,665 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:13,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 174 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 17:16:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-18 17:16:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2023-02-18 17:16:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 80 states have (on average 1.1625) internal successors, (93), 82 states have internal predecessors, (93), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2023-02-18 17:16:13,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 184 transitions. [2023-02-18 17:16:13,697 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 184 transitions. Word has length 81 [2023-02-18 17:16:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:13,697 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 184 transitions. [2023-02-18 17:16:13,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-18 17:16:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 184 transitions. [2023-02-18 17:16:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 17:16:13,698 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:13,698 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:16:13,705 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 17:16:13,903 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 17:16:13,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:13,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:13,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2023-02-18 17:16:13,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:13,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638510534] [2023-02-18 17:16:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:13,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:13,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:13,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228706895] [2023-02-18 17:16:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:13,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:13,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:13,921 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 17:16:13,923 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 17:16:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:13,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 17:16:13,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-02-18 17:16:14,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-02-18 17:16:14,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:14,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638510534] [2023-02-18 17:16:14,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:14,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228706895] [2023-02-18 17:16:14,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228706895] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:16:14,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:16:14,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-02-18 17:16:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635955985] [2023-02-18 17:16:14,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:14,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 17:16:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 17:16:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-02-18 17:16:14,794 INFO L87 Difference]: Start difference. First operand 140 states and 184 transitions. Second operand has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 11 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-18 17:16:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:16:21,609 INFO L93 Difference]: Finished difference Result 229 states and 315 transitions. [2023-02-18 17:16:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 17:16:21,610 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 11 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 87 [2023-02-18 17:16:21,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:16:21,611 INFO L225 Difference]: With dead ends: 229 [2023-02-18 17:16:21,611 INFO L226 Difference]: Without dead ends: 221 [2023-02-18 17:16:21,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=446, Invalid=2004, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 17:16:21,613 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:16:21,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 261 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-02-18 17:16:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-18 17:16:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2023-02-18 17:16:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 125 states have (on average 1.176) internal successors, (147), 128 states have internal predecessors, (147), 77 states have call successors, (77), 16 states have call predecessors, (77), 16 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2023-02-18 17:16:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 300 transitions. [2023-02-18 17:16:21,657 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 300 transitions. Word has length 87 [2023-02-18 17:16:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:16:21,658 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 300 transitions. [2023-02-18 17:16:21,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 11 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-18 17:16:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 300 transitions. [2023-02-18 17:16:21,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-18 17:16:21,659 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:16:21,659 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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 17:16:21,664 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 17:16:21,863 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 17:16:21,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:16:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:16:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2023-02-18 17:16:21,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:16:21,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488303765] [2023-02-18 17:16:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:21,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:16:21,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:16:21,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894340153] [2023-02-18 17:16:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:16:21,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:16:21,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:16:21,873 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 17:16:21,875 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 17:16:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:16:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-18 17:16:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:16:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 65 proven. 53 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-02-18 17:16:22,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:16:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 62 proven. 31 refuted. 1 times theorem prover too weak. 226 trivial. 0 not checked. [2023-02-18 17:16:26,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:16:26,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488303765] [2023-02-18 17:16:26,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:16:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894340153] [2023-02-18 17:16:26,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894340153] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:16:26,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:16:26,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2023-02-18 17:16:26,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746000193] [2023-02-18 17:16:26,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:16:26,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 17:16:26,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:16:26,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 17:16:26,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=565, Unknown=1, NotChecked=0, Total=702 [2023-02-18 17:16:26,194 INFO L87 Difference]: Start difference. First operand 219 states and 300 transitions. Second operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 22 states have internal predecessors, (45), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 13 states have call successors, (34) [2023-02-18 17:16:31,521 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 17:16:34,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:37,501 WARN L539 Checker$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 17:16:39,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:52,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:16:58,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:04,158 WARN L539 Checker$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 17:17:06,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:08,485 WARN L539 Checker$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 17:17:10,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:13,286 WARN L539 Checker$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 17:17:16,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:26,874 WARN L539 Checker$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 17:17:28,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:17:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:17:29,951 INFO L93 Difference]: Finished difference Result 293 states and 417 transitions. [2023-02-18 17:17:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 17:17:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 22 states have internal predecessors, (45), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 13 states have call successors, (34) Word has length 103 [2023-02-18 17:17:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:17:29,954 INFO L225 Difference]: With dead ends: 293 [2023-02-18 17:17:29,954 INFO L226 Difference]: Without dead ends: 291 [2023-02-18 17:17:29,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=471, Invalid=1688, Unknown=3, NotChecked=0, Total=2162 [2023-02-18 17:17:29,955 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 106 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 130 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:17:29,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 204 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1240 Invalid, 10 Unknown, 0 Unchecked, 44.3s Time] [2023-02-18 17:17:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-02-18 17:17:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 233. [2023-02-18 17:17:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 135 states have internal predecessors, (152), 85 states have call successors, (85), 17 states have call predecessors, (85), 17 states have return successors, (84), 80 states have call predecessors, (84), 84 states have call successors, (84) [2023-02-18 17:17:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 321 transitions. [2023-02-18 17:17:30,047 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 321 transitions. Word has length 103 [2023-02-18 17:17:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:17:30,047 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 321 transitions. [2023-02-18 17:17:30,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 22 states have internal predecessors, (45), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 14 states have call predecessors, (34), 13 states have call successors, (34) [2023-02-18 17:17:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 321 transitions. [2023-02-18 17:17:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-18 17:17:30,048 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:17:30,048 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:17:30,054 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 17:17:30,254 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 17:17:30,254 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:17:30,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:17:30,254 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2023-02-18 17:17:30,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:17:30,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809439954] [2023-02-18 17:17:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:17:30,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:17:30,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:17:30,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896553654] [2023-02-18 17:17:30,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:17:30,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:17:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:17:30,267 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 17:17:30,269 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 17:17:30,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:17:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:17:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 17:17:30,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:17:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-18 17:17:30,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:17:30,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:17:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809439954] [2023-02-18 17:17:30,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:17:30,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896553654] [2023-02-18 17:17:30,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896553654] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:17:30,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:17:30,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 17:17:30,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110348722] [2023-02-18 17:17:30,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:17:30,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:17:30,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:17:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:17:30,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 17:17:30,330 INFO L87 Difference]: Start difference. First operand 233 states and 321 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-02-18 17:17:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:17:30,451 INFO L93 Difference]: Finished difference Result 304 states and 417 transitions. [2023-02-18 17:17:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:17:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2023-02-18 17:17:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:17:30,452 INFO L225 Difference]: With dead ends: 304 [2023-02-18 17:17:30,452 INFO L226 Difference]: Without dead ends: 208 [2023-02-18 17:17:30,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 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 17:17:30,453 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:17:30,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:17:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-02-18 17:17:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2023-02-18 17:17:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 110 states have internal predecessors, (119), 66 states have call successors, (66), 17 states have call predecessors, (66), 17 states have return successors, (65), 63 states have call predecessors, (65), 65 states have call successors, (65) [2023-02-18 17:17:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 250 transitions. [2023-02-18 17:17:30,528 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 250 transitions. Word has length 106 [2023-02-18 17:17:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:17:30,528 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 250 transitions. [2023-02-18 17:17:30,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-02-18 17:17:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 250 transitions. [2023-02-18 17:17:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-18 17:17:30,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:17:30,529 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:17:30,534 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 17:17:30,734 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 17:17:30,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:17:30,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:17:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 2 times [2023-02-18 17:17:30,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:17:30,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923018431] [2023-02-18 17:17:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:17:30,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:17:30,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:17:30,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293019830] [2023-02-18 17:17:30,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:17:30,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:17:30,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:17:30,745 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 17:17:30,747 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 17:17:30,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:17:30,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:17:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 17:17:30,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:17:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 63 proven. 56 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-18 17:17:30,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:17:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 63 proven. 41 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-02-18 17:17:31,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:17:31,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923018431] [2023-02-18 17:17:31,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:17:31,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293019830] [2023-02-18 17:17:31,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293019830] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:17:31,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:17:31,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2023-02-18 17:17:31,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358549503] [2023-02-18 17:17:31,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:17:31,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 17:17:31,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:17:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 17:17:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2023-02-18 17:17:31,753 INFO L87 Difference]: Start difference. First operand 191 states and 250 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 25 states have internal predecessors, (54), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 14 states have call predecessors, (38), 14 states have call successors, (38) [2023-02-18 17:17:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:17:41,028 INFO L93 Difference]: Finished difference Result 247 states and 329 transitions. [2023-02-18 17:17:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 17:17:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 25 states have internal predecessors, (54), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 14 states have call predecessors, (38), 14 states have call successors, (38) Word has length 123 [2023-02-18 17:17:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:17:41,030 INFO L225 Difference]: With dead ends: 247 [2023-02-18 17:17:41,030 INFO L226 Difference]: Without dead ends: 245 [2023-02-18 17:17:41,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=518, Invalid=2562, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 17:17:41,031 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 137 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-02-18 17:17:41,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 316 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-02-18 17:17:41,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-02-18 17:17:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 220. [2023-02-18 17:17:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 123 states have (on average 1.113821138211382) internal successors, (137), 128 states have internal predecessors, (137), 76 states have call successors, (76), 20 states have call predecessors, (76), 20 states have return successors, (75), 71 states have call predecessors, (75), 75 states have call successors, (75) [2023-02-18 17:17:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 288 transitions. [2023-02-18 17:17:41,135 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 288 transitions. Word has length 123 [2023-02-18 17:17:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:17:41,135 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 288 transitions. [2023-02-18 17:17:41,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 25 states have internal predecessors, (54), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 14 states have call predecessors, (38), 14 states have call successors, (38) [2023-02-18 17:17:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 288 transitions. [2023-02-18 17:17:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 17:17:41,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:17:41,137 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:17:41,142 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 17:17:41,341 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 17:17:41,341 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:17:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:17:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2023-02-18 17:17:41,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:17:41,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586672838] [2023-02-18 17:17:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:17:41,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:17:41,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:17:41,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681283633] [2023-02-18 17:17:41,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:17:41,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:17:41,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:17:41,369 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 17:17:41,371 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 17:17:41,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:17:41,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:17:41,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 17:17:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:17:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-02-18 17:17:41,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:17:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-02-18 17:17:42,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:17:42,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586672838] [2023-02-18 17:17:42,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:17:42,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681283633] [2023-02-18 17:17:42,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681283633] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:17:42,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:17:42,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-18 17:17:42,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563922354] [2023-02-18 17:17:42,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:17:42,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 17:17:42,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:17:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 17:17:42,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-02-18 17:17:42,650 INFO L87 Difference]: Start difference. First operand 220 states and 288 transitions. Second operand has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2023-02-18 17:18:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:18:05,036 INFO L93 Difference]: Finished difference Result 366 states and 511 transitions. [2023-02-18 17:18:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-18 17:18:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) Word has length 134 [2023-02-18 17:18:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:18:05,038 INFO L225 Difference]: With dead ends: 366 [2023-02-18 17:18:05,038 INFO L226 Difference]: Without dead ends: 358 [2023-02-18 17:18:05,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=855, Invalid=4115, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 17:18:05,039 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 208 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:18:05,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 678 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2023-02-18 17:18:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-02-18 17:18:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 331. [2023-02-18 17:18:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 178 states have (on average 1.1348314606741574) internal successors, (202), 184 states have internal predecessors, (202), 128 states have call successors, (128), 24 states have call predecessors, (128), 24 states have return successors, (127), 122 states have call predecessors, (127), 127 states have call successors, (127) [2023-02-18 17:18:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 457 transitions. [2023-02-18 17:18:05,254 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 457 transitions. Word has length 134 [2023-02-18 17:18:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:18:05,254 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 457 transitions. [2023-02-18 17:18:05,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2023-02-18 17:18:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 457 transitions. [2023-02-18 17:18:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-18 17:18:05,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:18:05,257 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:18:05,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-18 17:18:05,462 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 17:18:05,462 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:18:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:18:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 3 times [2023-02-18 17:18:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:18:05,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312788385] [2023-02-18 17:18:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:18:05,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:18:05,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:18:05,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592590964] [2023-02-18 17:18:05,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:18:05,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:18:05,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:18:05,471 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 17:18:05,474 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 17:18:06,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 17:18:06,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:18:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-18 17:18:06,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:18:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 115 proven. 58 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-02-18 17:18:06,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:18:06,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:18:06,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312788385] [2023-02-18 17:18:06,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:18:06,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592590964] [2023-02-18 17:18:06,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592590964] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:18:06,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:18:06,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-18 17:18:06,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360363045] [2023-02-18 17:18:06,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:18:06,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 17:18:06,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:18:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 17:18:06,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2023-02-18 17:18:06,883 INFO L87 Difference]: Start difference. First operand 331 states and 457 transitions. Second operand has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-18 17:18:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:18:08,765 INFO L93 Difference]: Finished difference Result 369 states and 507 transitions. [2023-02-18 17:18:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 17:18:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 150 [2023-02-18 17:18:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:18:08,767 INFO L225 Difference]: With dead ends: 369 [2023-02-18 17:18:08,767 INFO L226 Difference]: Without dead ends: 367 [2023-02-18 17:18:08,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 17:18:08,768 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:18:08,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 241 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 17:18:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-18 17:18:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 364. [2023-02-18 17:18:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 196 states have (on average 1.1377551020408163) internal successors, (223), 202 states have internal predecessors, (223), 140 states have call successors, (140), 27 states have call predecessors, (140), 27 states have return successors, (139), 134 states have call predecessors, (139), 139 states have call successors, (139) [2023-02-18 17:18:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 502 transitions. [2023-02-18 17:18:08,987 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 502 transitions. Word has length 150 [2023-02-18 17:18:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:18:08,987 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 502 transitions. [2023-02-18 17:18:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-02-18 17:18:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 502 transitions. [2023-02-18 17:18:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-18 17:18:08,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:18:08,989 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:18:09,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-18 17:18:09,195 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 17:18:09,195 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:18:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:18:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash 134968607, now seen corresponding path program 3 times [2023-02-18 17:18:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:18:09,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42649048] [2023-02-18 17:18:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:18:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:18:09,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:18:09,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319502737] [2023-02-18 17:18:09,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:18:09,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:18:09,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:18:09,205 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 17:18:09,206 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 17:18:09,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 17:18:09,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:18:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 17:18:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:18:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 86 proven. 9 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-02-18 17:18:09,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:18:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 86 proven. 9 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-02-18 17:18:09,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:18:09,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42649048] [2023-02-18 17:18:09,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:18:09,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319502737] [2023-02-18 17:18:09,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319502737] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:18:09,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:18:09,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2023-02-18 17:18:09,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871106937] [2023-02-18 17:18:09,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:18:09,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 17:18:09,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:18:09,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 17:18:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 17:18:09,311 INFO L87 Difference]: Start difference. First operand 364 states and 502 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-02-18 17:18:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:18:09,713 INFO L93 Difference]: Finished difference Result 414 states and 583 transitions. [2023-02-18 17:18:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 17:18:09,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 159 [2023-02-18 17:18:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:18:09,715 INFO L225 Difference]: With dead ends: 414 [2023-02-18 17:18:09,715 INFO L226 Difference]: Without dead ends: 407 [2023-02-18 17:18:09,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 306 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-02-18 17:18:09,716 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 20 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 17:18:09,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 253 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 17:18:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-02-18 17:18:09,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 364. [2023-02-18 17:18:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 196 states have (on average 1.1326530612244898) internal successors, (222), 202 states have internal predecessors, (222), 140 states have call successors, (140), 27 states have call predecessors, (140), 27 states have return successors, (139), 134 states have call predecessors, (139), 139 states have call successors, (139) [2023-02-18 17:18:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 501 transitions. [2023-02-18 17:18:09,938 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 501 transitions. Word has length 159 [2023-02-18 17:18:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:18:09,938 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 501 transitions. [2023-02-18 17:18:09,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-02-18 17:18:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 501 transitions. [2023-02-18 17:18:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-02-18 17:18:09,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:18:09,949 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:18:09,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-18 17:18:10,154 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 17:18:10,154 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:18:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:18:10,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2114909687, now seen corresponding path program 4 times [2023-02-18 17:18:10,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:18:10,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866201378] [2023-02-18 17:18:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:18:10,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:18:10,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:18:10,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581106064] [2023-02-18 17:18:10,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:18:10,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:18:10,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:18:10,166 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 17:18:10,168 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 17:18:10,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:18:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:18:10,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-18 17:18:10,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:18:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 162 proven. 104 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2023-02-18 17:18:10,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:18:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 108 proven. 86 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2023-02-18 17:18:11,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:18:11,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866201378] [2023-02-18 17:18:11,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:18:11,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581106064] [2023-02-18 17:18:11,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581106064] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:18:11,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:18:11,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-02-18 17:18:11,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159557294] [2023-02-18 17:18:11,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:18:11,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 17:18:11,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:18:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 17:18:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 17:18:11,737 INFO L87 Difference]: Start difference. First operand 364 states and 501 transitions. Second operand has 34 states, 32 states have (on average 1.9375) internal successors, (62), 29 states have internal predecessors, (62), 19 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) [2023-02-18 17:18:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:18:23,466 INFO L93 Difference]: Finished difference Result 439 states and 607 transitions. [2023-02-18 17:18:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 17:18:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.9375) internal successors, (62), 29 states have internal predecessors, (62), 19 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) Word has length 167 [2023-02-18 17:18:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:18:23,471 INFO L225 Difference]: With dead ends: 439 [2023-02-18 17:18:23,471 INFO L226 Difference]: Without dead ends: 437 [2023-02-18 17:18:23,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 298 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=681, Invalid=3225, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 17:18:23,473 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 158 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-02-18 17:18:23,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 328 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-02-18 17:18:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-02-18 17:18:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 417. [2023-02-18 17:18:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 229 states have internal predecessors, (253), 163 states have call successors, (163), 31 states have call predecessors, (163), 31 states have return successors, (162), 156 states have call predecessors, (162), 162 states have call successors, (162) [2023-02-18 17:18:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 578 transitions. [2023-02-18 17:18:23,818 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 578 transitions. Word has length 167 [2023-02-18 17:18:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:18:23,819 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 578 transitions. [2023-02-18 17:18:23,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.9375) internal successors, (62), 29 states have internal predecessors, (62), 19 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 19 states have call predecessors, (54), 17 states have call successors, (54) [2023-02-18 17:18:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 578 transitions. [2023-02-18 17:18:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-18 17:18:23,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:18:23,821 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:18:23,826 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 17:18:24,026 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 17:18:24,028 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:18:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:18:24,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 5 times [2023-02-18 17:18:24,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:18:24,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401108747] [2023-02-18 17:18:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:18:24,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:18:24,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:18:24,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903005510] [2023-02-18 17:18:24,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 17:18:24,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:18:24,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:18:24,054 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 17:18:24,101 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 17:18:50,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 17:18:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:18:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 17:18:50,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:18:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 131 proven. 285 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2023-02-18 17:18:51,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:18:51,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:18:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401108747] [2023-02-18 17:18:51,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:18:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903005510] [2023-02-18 17:18:51,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903005510] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:18:51,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:18:51,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-18 17:18:51,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342710172] [2023-02-18 17:18:51,976 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:18:51,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 17:18:51,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:18:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 17:18:51,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2023-02-18 17:18:51,977 INFO L87 Difference]: Start difference. First operand 417 states and 578 transitions. Second operand has 21 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2023-02-18 17:18:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:18:57,385 INFO L93 Difference]: Finished difference Result 495 states and 695 transitions. [2023-02-18 17:18:57,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 17:18:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) Word has length 175 [2023-02-18 17:18:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:18:57,387 INFO L225 Difference]: With dead ends: 495 [2023-02-18 17:18:57,387 INFO L226 Difference]: Without dead ends: 493 [2023-02-18 17:18:57,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 17:18:57,388 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 40 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:18:57,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 440 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-02-18 17:18:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-18 17:18:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 477. [2023-02-18 17:18:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 253 states have (on average 1.1462450592885376) internal successors, (290), 261 states have internal predecessors, (290), 189 states have call successors, (189), 34 states have call predecessors, (189), 34 states have return successors, (188), 181 states have call predecessors, (188), 188 states have call successors, (188) [2023-02-18 17:18:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 667 transitions. [2023-02-18 17:18:57,774 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 667 transitions. Word has length 175 [2023-02-18 17:18:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:18:57,775 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 667 transitions. [2023-02-18 17:18:57,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2023-02-18 17:18:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 667 transitions. [2023-02-18 17:18:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-02-18 17:18:57,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:18:57,777 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:18:57,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-18 17:18:57,984 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 17:18:57,984 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:18:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:18:57,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1493603019, now seen corresponding path program 4 times [2023-02-18 17:18:57,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:18:57,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806814693] [2023-02-18 17:18:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:18:57,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:18:58,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:18:58,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697624905] [2023-02-18 17:18:58,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:18:58,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:18:58,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:18:58,006 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 17:18:58,008 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 17:18:58,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:18:58,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:18:58,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-18 17:18:58,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:18:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 54 proven. 106 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2023-02-18 17:18:58,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:19:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2023-02-18 17:19:01,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:19:01,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806814693] [2023-02-18 17:19:01,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:19:01,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697624905] [2023-02-18 17:19:01,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697624905] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:19:01,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:19:01,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-02-18 17:19:01,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342536889] [2023-02-18 17:19:01,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:19:01,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 17:19:01,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:19:01,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 17:19:01,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-02-18 17:19:01,018 INFO L87 Difference]: Start difference. First operand 477 states and 667 transitions. Second operand has 31 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 18 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (58), 16 states have call predecessors, (58), 16 states have call successors, (58) [2023-02-18 17:19:49,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:19:55,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:10,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:20:15,729 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 17:20:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:20:20,300 INFO L93 Difference]: Finished difference Result 724 states and 1065 transitions. [2023-02-18 17:20:20,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-18 17:20:20,300 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 18 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (58), 16 states have call predecessors, (58), 16 states have call successors, (58) Word has length 178 [2023-02-18 17:20:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:20:20,303 INFO L225 Difference]: With dead ends: 724 [2023-02-18 17:20:20,303 INFO L226 Difference]: Without dead ends: 716 [2023-02-18 17:20:20,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 324 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=1433, Invalid=6399, Unknown=0, NotChecked=0, Total=7832 [2023-02-18 17:20:20,305 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 246 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 3216 mSolverCounterSat, 717 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 3934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 3216 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:20:20,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 890 Invalid, 3934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 3216 Invalid, 1 Unknown, 0 Unchecked, 64.5s Time] [2023-02-18 17:20:20,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-02-18 17:20:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 655. [2023-02-18 17:20:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 331 states have (on average 1.1722054380664653) internal successors, (388), 339 states have internal predecessors, (388), 285 states have call successors, (285), 38 states have call predecessors, (285), 38 states have return successors, (284), 277 states have call predecessors, (284), 284 states have call successors, (284) [2023-02-18 17:20:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 957 transitions. [2023-02-18 17:20:20,914 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 957 transitions. Word has length 178 [2023-02-18 17:20:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:20:20,915 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 957 transitions. [2023-02-18 17:20:20,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 18 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (58), 16 states have call predecessors, (58), 16 states have call successors, (58) [2023-02-18 17:20:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 957 transitions. [2023-02-18 17:20:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-02-18 17:20:20,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:20:20,917 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:20:20,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-18 17:20:21,121 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 17:20:21,121 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:20:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:20:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1847000169, now seen corresponding path program 5 times [2023-02-18 17:20:21,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:20:21,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703125364] [2023-02-18 17:20:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:20:21,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:20:21,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:20:21,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372909580] [2023-02-18 17:20:21,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 17:20:21,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:20:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:20:21,134 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 17:20:21,136 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 17:20:21,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 17:20:21,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:20:21,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 17:20:21,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:20:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 89 proven. 140 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2023-02-18 17:20:21,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:20:24,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:20:24,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703125364] [2023-02-18 17:20:24,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:20:24,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372909580] [2023-02-18 17:20:24,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372909580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:20:24,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:20:24,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-02-18 17:20:24,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900996083] [2023-02-18 17:20:24,515 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:20:24,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 17:20:24,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:20:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 17:20:24,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 17:20:24,516 INFO L87 Difference]: Start difference. First operand 655 states and 957 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-18 17:20:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:20:26,817 INFO L93 Difference]: Finished difference Result 787 states and 1130 transitions. [2023-02-18 17:20:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 17:20:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) Word has length 178 [2023-02-18 17:20:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:20:26,820 INFO L225 Difference]: With dead ends: 787 [2023-02-18 17:20:26,820 INFO L226 Difference]: Without dead ends: 707 [2023-02-18 17:20:26,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 17:20:26,822 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 54 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:20:26,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 282 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 17:20:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2023-02-18 17:20:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 704. [2023-02-18 17:20:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 356 states have (on average 1.1685393258426966) internal successors, (416), 364 states have internal predecessors, (416), 305 states have call successors, (305), 42 states have call predecessors, (305), 42 states have return successors, (304), 297 states have call predecessors, (304), 304 states have call successors, (304) [2023-02-18 17:20:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1025 transitions. [2023-02-18 17:20:27,454 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1025 transitions. Word has length 178 [2023-02-18 17:20:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:20:27,455 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 1025 transitions. [2023-02-18 17:20:27,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-18 17:20:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1025 transitions. [2023-02-18 17:20:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-02-18 17:20:27,457 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:20:27,457 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:20:27,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-18 17:20:27,663 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 17:20:27,663 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:20:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:20:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1062534286, now seen corresponding path program 6 times [2023-02-18 17:20:27,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:20:27,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809491303] [2023-02-18 17:20:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:20:27,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:20:27,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:20:27,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891204803] [2023-02-18 17:20:27,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 17:20:27,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:20:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:20:27,675 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 17:20:27,681 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 17:20:33,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 17:20:33,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:20:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 17:20:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:20:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 210 proven. 21 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2023-02-18 17:20:34,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:20:34,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:20:34,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809491303] [2023-02-18 17:20:34,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:20:34,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891204803] [2023-02-18 17:20:34,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891204803] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:20:34,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:20:34,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 17:20:34,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505525708] [2023-02-18 17:20:34,332 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:20:34,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 17:20:34,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:20:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 17:20:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-02-18 17:20:34,333 INFO L87 Difference]: Start difference. First operand 704 states and 1025 transitions. Second operand has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-18 17:20:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:20:38,164 INFO L93 Difference]: Finished difference Result 710 states and 1030 transitions. [2023-02-18 17:20:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 17:20:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 197 [2023-02-18 17:20:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:20:38,175 INFO L225 Difference]: With dead ends: 710 [2023-02-18 17:20:38,175 INFO L226 Difference]: Without dead ends: 708 [2023-02-18 17:20:38,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2023-02-18 17:20:38,176 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-18 17:20:38,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 165 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-18 17:20:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-02-18 17:20:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 708. [2023-02-18 17:20:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 359 states have (on average 1.1671309192200556) internal successors, (419), 367 states have internal predecessors, (419), 305 states have call successors, (305), 43 states have call predecessors, (305), 43 states have return successors, (304), 297 states have call predecessors, (304), 304 states have call successors, (304) [2023-02-18 17:20:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1028 transitions. [2023-02-18 17:20:38,830 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1028 transitions. Word has length 197 [2023-02-18 17:20:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:20:38,830 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 1028 transitions. [2023-02-18 17:20:38,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-18 17:20:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1028 transitions. [2023-02-18 17:20:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-02-18 17:20:38,832 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:20:38,833 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:20:38,841 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 17:20:39,038 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 17:20:39,039 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:20:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:20:39,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1119272264, now seen corresponding path program 6 times [2023-02-18 17:20:39,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:20:39,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458769978] [2023-02-18 17:20:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:20:39,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:20:39,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:20:39,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253492315] [2023-02-18 17:20:39,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 17:20:39,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:20:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:20:39,062 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 17:20:39,063 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 17:20:39,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 17:20:39,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:20:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 87 conjunts are in the unsatisfiable core [2023-02-18 17:20:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:20:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 219 proven. 132 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2023-02-18 17:20:41,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:20:46,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:20:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458769978] [2023-02-18 17:20:46,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:20:46,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253492315] [2023-02-18 17:20:46,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253492315] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:20:46,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:20:46,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 17:20:46,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890029471] [2023-02-18 17:20:46,998 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:20:46,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 17:20:46,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:20:46,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 17:20:47,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1080, Unknown=2, NotChecked=0, Total=1260 [2023-02-18 17:20:47,000 INFO L87 Difference]: Start difference. First operand 708 states and 1028 transitions. Second operand has 23 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2023-02-18 17:20:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:20:54,757 INFO L93 Difference]: Finished difference Result 810 states and 1176 transitions. [2023-02-18 17:20:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 17:20:54,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 200 [2023-02-18 17:20:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:20:54,760 INFO L225 Difference]: With dead ends: 810 [2023-02-18 17:20:54,760 INFO L226 Difference]: Without dead ends: 803 [2023-02-18 17:20:54,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=322, Invalid=1931, Unknown=3, NotChecked=0, Total=2256 [2023-02-18 17:20:54,762 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 47 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:20:54,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 310 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-02-18 17:20:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-02-18 17:20:55,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 795. [2023-02-18 17:20:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 399 states have (on average 1.1729323308270676) internal successors, (468), 405 states have internal predecessors, (468), 347 states have call successors, (347), 48 states have call predecessors, (347), 48 states have return successors, (346), 341 states have call predecessors, (346), 346 states have call successors, (346) [2023-02-18 17:20:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1161 transitions. [2023-02-18 17:20:55,574 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1161 transitions. Word has length 200 [2023-02-18 17:20:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:20:55,575 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1161 transitions. [2023-02-18 17:20:55,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2023-02-18 17:20:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1161 transitions. [2023-02-18 17:20:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-02-18 17:20:55,579 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:20:55,579 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:20:55,597 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 17:20:55,785 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 17:20:55,785 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:20:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:20:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash 659368221, now seen corresponding path program 7 times [2023-02-18 17:20:55,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:20:55,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514794088] [2023-02-18 17:20:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:20:55,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:20:55,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:20:55,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569804049] [2023-02-18 17:20:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 17:20:55,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:20:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:20:55,809 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 17:20:55,843 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 17:20:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:20:55,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 110 conjunts are in the unsatisfiable core [2023-02-18 17:20:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:20:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 147 proven. 233 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2023-02-18 17:20:58,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:29,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514794088] [2023-02-18 17:21:29,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:29,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569804049] [2023-02-18 17:21:29,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569804049] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:21:29,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:21:29,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-02-18 17:21:29,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417965015] [2023-02-18 17:21:29,850 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:29,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 17:21:29,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 17:21:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1554, Unknown=9, NotChecked=0, Total=1806 [2023-02-18 17:21:29,853 INFO L87 Difference]: Start difference. First operand 795 states and 1161 transitions. Second operand has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 14 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2023-02-18 17:21:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:39,500 INFO L93 Difference]: Finished difference Result 877 states and 1271 transitions. [2023-02-18 17:21:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 17:21:39,501 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 14 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 203 [2023-02-18 17:21:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:39,504 INFO L225 Difference]: With dead ends: 877 [2023-02-18 17:21:39,504 INFO L226 Difference]: Without dead ends: 870 [2023-02-18 17:21:39,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=444, Invalid=2739, Unknown=9, NotChecked=0, Total=3192 [2023-02-18 17:21:39,506 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 69 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 2451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:39,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 401 Invalid, 2451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-02-18 17:21:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-02-18 17:21:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 864. [2023-02-18 17:21:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 434 states have (on average 1.172811059907834) internal successors, (509), 440 states have internal predecessors, (509), 375 states have call successors, (375), 54 states have call predecessors, (375), 54 states have return successors, (374), 369 states have call predecessors, (374), 374 states have call successors, (374) [2023-02-18 17:21:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1258 transitions. [2023-02-18 17:21:40,347 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1258 transitions. Word has length 203 [2023-02-18 17:21:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:40,347 INFO L495 AbstractCegarLoop]: Abstraction has 864 states and 1258 transitions. [2023-02-18 17:21:40,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 14 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2023-02-18 17:21:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1258 transitions. [2023-02-18 17:21:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-18 17:21:40,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:40,350 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:40,371 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 17:21:40,555 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 17:21:40,556 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:40,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -555771049, now seen corresponding path program 7 times [2023-02-18 17:21:40,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:40,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809782268] [2023-02-18 17:21:40,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:40,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:40,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:40,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460950821] [2023-02-18 17:21:40,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 17:21:40,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:40,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:40,589 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 17:21:40,613 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 17:21:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:21:40,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 17:21:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2021 backedges. 308 proven. 148 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2023-02-18 17:21:40,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2021 backedges. 103 proven. 133 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2023-02-18 17:21:41,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:41,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809782268] [2023-02-18 17:21:41,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:41,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460950821] [2023-02-18 17:21:41,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460950821] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:41,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:41,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-02-18 17:21:41,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543738726] [2023-02-18 17:21:41,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:41,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 17:21:41,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 17:21:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2023-02-18 17:21:41,161 INFO L87 Difference]: Start difference. First operand 864 states and 1258 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 20 states have call successors, (72), 2 states have call predecessors, (72), 3 states have return successors, (72), 19 states have call predecessors, (72), 20 states have call successors, (72) [2023-02-18 17:21:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:43,826 INFO L93 Difference]: Finished difference Result 1088 states and 1574 transitions. [2023-02-18 17:21:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 17:21:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 20 states have call successors, (72), 2 states have call predecessors, (72), 3 states have return successors, (72), 19 states have call predecessors, (72), 20 states have call successors, (72) Word has length 211 [2023-02-18 17:21:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:43,830 INFO L225 Difference]: With dead ends: 1088 [2023-02-18 17:21:43,830 INFO L226 Difference]: Without dead ends: 918 [2023-02-18 17:21:43,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=783, Invalid=3123, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 17:21:43,832 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 118 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:43,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 571 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 17:21:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2023-02-18 17:21:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 896. [2023-02-18 17:21:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 450 states have (on average 1.1644444444444444) internal successors, (524), 457 states have internal predecessors, (524), 391 states have call successors, (391), 54 states have call predecessors, (391), 54 states have return successors, (390), 384 states have call predecessors, (390), 390 states have call successors, (390) [2023-02-18 17:21:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1305 transitions. [2023-02-18 17:21:44,697 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1305 transitions. Word has length 211 [2023-02-18 17:21:44,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:44,697 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1305 transitions. [2023-02-18 17:21:44,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 20 states have call successors, (72), 2 states have call predecessors, (72), 3 states have return successors, (72), 19 states have call predecessors, (72), 20 states have call successors, (72) [2023-02-18 17:21:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1305 transitions. [2023-02-18 17:21:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-02-18 17:21:44,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:44,700 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:44,709 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 17:21:44,905 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 17:21:44,906 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1256569840, now seen corresponding path program 8 times [2023-02-18 17:21:44,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:44,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397763229] [2023-02-18 17:21:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:44,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:44,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:44,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561045324] [2023-02-18 17:21:44,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:21:44,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:44,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:44,914 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 17:21:44,916 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 17:21:45,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:21:45,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:21:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 107 conjunts are in the unsatisfiable core [2023-02-18 17:21:45,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 243 proven. 244 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2023-02-18 17:21:45,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:45,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:45,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397763229] [2023-02-18 17:21:45,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:45,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561045324] [2023-02-18 17:21:45,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561045324] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:21:45,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:21:45,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-18 17:21:45,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775533408] [2023-02-18 17:21:45,666 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:45,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 17:21:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 17:21:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2023-02-18 17:21:45,667 INFO L87 Difference]: Start difference. First operand 896 states and 1305 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 17:21:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:21:47,980 INFO L93 Difference]: Finished difference Result 965 states and 1391 transitions. [2023-02-18 17:21:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 17:21:47,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) Word has length 214 [2023-02-18 17:21:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:21:48,001 INFO L225 Difference]: With dead ends: 965 [2023-02-18 17:21:48,001 INFO L226 Difference]: Without dead ends: 963 [2023-02-18 17:21:48,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 17:21:48,002 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 60 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 17:21:48,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 371 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 17:21:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2023-02-18 17:21:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 957. [2023-02-18 17:21:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 484 states have (on average 1.1611570247933884) internal successors, (562), 491 states have internal predecessors, (562), 411 states have call successors, (411), 61 states have call predecessors, (411), 61 states have return successors, (410), 404 states have call predecessors, (410), 410 states have call successors, (410) [2023-02-18 17:21:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1383 transitions. [2023-02-18 17:21:48,943 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1383 transitions. Word has length 214 [2023-02-18 17:21:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:21:48,943 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1383 transitions. [2023-02-18 17:21:48,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2023-02-18 17:21:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1383 transitions. [2023-02-18 17:21:48,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-02-18 17:21:48,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:21:48,969 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:21:48,976 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 17:21:49,174 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 17:21:49,174 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:21:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:21:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1331090799, now seen corresponding path program 8 times [2023-02-18 17:21:49,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:21:49,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991487270] [2023-02-18 17:21:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:21:49,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:21:49,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:21:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758536957] [2023-02-18 17:21:49,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:21:49,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:21:49,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:21:49,185 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 17:21:49,214 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 17:21:49,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:21:49,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:21:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-18 17:21:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:21:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 70 proven. 184 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2023-02-18 17:21:49,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:21:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 64 proven. 175 refuted. 0 times theorem prover too weak. 2044 trivial. 0 not checked. [2023-02-18 17:21:52,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:21:52,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991487270] [2023-02-18 17:21:52,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:21:52,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758536957] [2023-02-18 17:21:52,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758536957] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:21:52,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:21:52,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2023-02-18 17:21:52,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054985482] [2023-02-18 17:21:52,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:21:52,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 17:21:52,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:21:52,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 17:21:52,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 17:21:52,662 INFO L87 Difference]: Start difference. First operand 957 states and 1383 transitions. Second operand has 35 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 22 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 20 states have call predecessors, (74), 20 states have call successors, (74) [2023-02-18 17:22:10,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:48,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 17:22:50,963 WARN L539 Checker$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 17:23:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:23:02,075 INFO L93 Difference]: Finished difference Result 1188 states and 1767 transitions. [2023-02-18 17:23:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-18 17:23:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 22 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 20 states have call predecessors, (74), 20 states have call successors, (74) Word has length 222 [2023-02-18 17:23:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:23:02,080 INFO L225 Difference]: With dead ends: 1188 [2023-02-18 17:23:02,080 INFO L226 Difference]: Without dead ends: 1180 [2023-02-18 17:23:02,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1941 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=1446, Invalid=6926, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 17:23:02,103 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 282 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 4338 mSolverCounterSat, 899 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 5239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 899 IncrementalHoareTripleChecker+Valid, 4338 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:23:02,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1299 Invalid, 5239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [899 Valid, 4338 Invalid, 2 Unknown, 0 Unchecked, 54.4s Time] [2023-02-18 17:23:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2023-02-18 17:23:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1155. [2023-02-18 17:23:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 559 states have (on average 1.1896243291592128) internal successors, (665), 566 states have internal predecessors, (665), 531 states have call successors, (531), 64 states have call predecessors, (531), 64 states have return successors, (530), 524 states have call predecessors, (530), 530 states have call successors, (530) [2023-02-18 17:23:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1726 transitions. [2023-02-18 17:23:03,517 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1726 transitions. Word has length 222 [2023-02-18 17:23:03,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:03,518 INFO L495 AbstractCegarLoop]: Abstraction has 1155 states and 1726 transitions. [2023-02-18 17:23:03,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 22 states have call successors, (75), 3 states have call predecessors, (75), 2 states have return successors, (74), 20 states have call predecessors, (74), 20 states have call successors, (74) [2023-02-18 17:23:03,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1726 transitions. [2023-02-18 17:23:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-02-18 17:23:03,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:03,531 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:03,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-18 17:23:03,736 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 17:23:03,736 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash 106802133, now seen corresponding path program 9 times [2023-02-18 17:23:03,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:23:03,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134162134] [2023-02-18 17:23:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:03,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:23:03,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:23:03,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291373997] [2023-02-18 17:23:03,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:23:03,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:23:03,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:23:03,748 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 17:23:03,750 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 17:23:04,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 17:23:04,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:23:04,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-18 17:23:04,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:23:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 250 proven. 139 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2023-02-18 17:23:04,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:23:08,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 17:23:08,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134162134] [2023-02-18 17:23:08,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 17:23:08,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291373997] [2023-02-18 17:23:08,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291373997] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:23:08,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:23:08,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-18 17:23:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003541953] [2023-02-18 17:23:08,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 17:23:08,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 17:23:08,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 17:23:08,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 17:23:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=600, Unknown=1, NotChecked=0, Total=702 [2023-02-18 17:23:08,508 INFO L87 Difference]: Start difference. First operand 1155 states and 1726 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 17:23:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:23:12,899 INFO L93 Difference]: Finished difference Result 1268 states and 1866 transitions. [2023-02-18 17:23:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 17:23:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) Word has length 222 [2023-02-18 17:23:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:23:12,904 INFO L225 Difference]: With dead ends: 1268 [2023-02-18 17:23:12,904 INFO L226 Difference]: Without dead ends: 1216 [2023-02-18 17:23:12,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=170, Invalid=951, Unknown=1, NotChecked=0, Total=1122 [2023-02-18 17:23:12,904 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 30 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:23:12,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 256 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-02-18 17:23:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2023-02-18 17:23:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1099. [2023-02-18 17:23:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 545 states have (on average 1.1724770642201834) internal successors, (639), 551 states have internal predecessors, (639), 483 states have call successors, (483), 70 states have call predecessors, (483), 70 states have return successors, (482), 477 states have call predecessors, (482), 482 states have call successors, (482) [2023-02-18 17:23:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1604 transitions. [2023-02-18 17:23:14,090 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1604 transitions. Word has length 222 [2023-02-18 17:23:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:14,090 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 1604 transitions. [2023-02-18 17:23:14,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 17:23:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1604 transitions. [2023-02-18 17:23:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-02-18 17:23:14,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:14,094 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:14,101 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 17:23:14,304 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 17:23:14,305 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:14,305 INFO L85 PathProgramCache]: Analyzing trace with hash -932224612, now seen corresponding path program 10 times [2023-02-18 17:23:14,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 17:23:14,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048456073] [2023-02-18 17:23:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:14,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 17:23:14,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 17:23:14,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101139651] [2023-02-18 17:23:14,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 17:23:14,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 17:23:14,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:23:14,334 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 17:23:14,335 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 17:23:14,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 17:23:14,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unknown [2023-02-18 17:23:14,429 WARN L124 FreeRefinementEngine]: Strategy CAMEL was unsuccessful and could not determine trace feasibility [2023-02-18 17:23:14,429 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2023-02-18 17:23:14,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 17:23:14,442 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 17:23:14,637 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 17:23:14,639 INFO L445 BasicCegarLoop]: Path program histogram: [10, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:14,643 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 17:23:14,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 05:23:14 BoogieIcfgContainer [2023-02-18 17:23:14,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 17:23:14,673 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 17:23:14,673 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 17:23:14,673 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 17:23:14,673 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:16:06" (3/4) ... [2023-02-18 17:23:14,675 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-18 17:23:14,675 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 17:23:14,675 INFO L158 Benchmark]: Toolchain (without parser) took 428156.83ms. Allocated memory was 132.1MB in the beginning and 587.2MB in the end (delta: 455.1MB). Free memory was 102.2MB in the beginning and 497.5MB in the end (delta: -395.3MB). Peak memory consumption was 59.5MB. Max. memory is 16.1GB. [2023-02-18 17:23:14,675 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 107.0MB. Free memory is still 61.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 17:23:14,675 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.72ms. Allocated memory is still 132.1MB. Free memory was 101.5MB in the beginning and 90.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 17:23:14,676 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.79ms. Allocated memory is still 132.1MB. Free memory was 90.6MB in the beginning and 89.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 17:23:14,676 INFO L158 Benchmark]: Boogie Preprocessor took 16.52ms. Allocated memory is still 132.1MB. Free memory was 89.1MB in the beginning and 88.2MB in the end (delta: 873.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 17:23:14,676 INFO L158 Benchmark]: RCFGBuilder took 228.78ms. Allocated memory is still 132.1MB. Free memory was 87.6MB in the beginning and 76.5MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 17:23:14,676 INFO L158 Benchmark]: TraceAbstraction took 427686.71ms. Allocated memory was 132.1MB in the beginning and 587.2MB in the end (delta: 455.1MB). Free memory was 75.9MB in the beginning and 498.5MB in the end (delta: -422.6MB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. [2023-02-18 17:23:14,676 INFO L158 Benchmark]: Witness Printer took 2.41ms. Allocated memory is still 587.2MB. Free memory is still 497.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 17:23:14,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 107.0MB. Free memory is still 61.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.72ms. Allocated memory is still 132.1MB. Free memory was 101.5MB in the beginning and 90.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.79ms. Allocated memory is still 132.1MB. Free memory was 90.6MB in the beginning and 89.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.52ms. Allocated memory is still 132.1MB. Free memory was 89.1MB in the beginning and 88.2MB in the end (delta: 873.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 228.78ms. Allocated memory is still 132.1MB. Free memory was 87.6MB in the beginning and 76.5MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 427686.71ms. Allocated memory was 132.1MB in the beginning and 587.2MB in the end (delta: 455.1MB). Free memory was 75.9MB in the beginning and 498.5MB in the end (delta: -422.6MB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. * Witness Printer took 2.41ms. Allocated memory is still 587.2MB. Free memory is still 497.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s, c, k, xy, yy; [L21] x = __VERIFIER_nondet_int() [L22] CALL assume_abort_if_not(x>=0 && x<=10) [L8] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x>=0 && x<=10) [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(y>=0 && y<=10) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y>=0 && y<=10) [L25] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(x >= 1) [L26] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L32] r = 0 [L33] s = 1 [L34] c = 0 [L35] k = 0 [L36] xy = (long long) x * y [L37] yy = (long long) y * y [L38] CALL assume_abort_if_not(xy < 2147483647) [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(xy < 2147483647) [L39] CALL assume_abort_if_not(yy < 2147483647) [L8] COND FALSE !(!cond) [L39] RET assume_abort_if_not(yy < 2147483647) [L41] COND TRUE 1 [L42] COND FALSE !(!(b != 0)) [L44] c = a [L45] k = 0 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE !(c >= b) [L58] a = b [L59] b = c [L61] long long temp; [L62] temp = p [L63] p = q [L64] q = temp - q * k [L65] temp = r [L66] r = s [L67] s = temp - s * k [L41] COND TRUE 1 [L42] COND FALSE !(!(b != 0)) [L44] c = a [L45] k = 0 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE !(c >= b) [L58] a = b [L59] b = c [L61] long long temp; [L62] temp = p [L63] p = q [L64] q = temp - q * k [L65] temp = r [L66] r = s [L67] s = temp - s * k [L41] COND TRUE 1 [L42] COND FALSE !(!(b != 0)) [L44] c = a [L45] k = 0 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND FALSE !(!(c >= b)) [L54] c = c - b [L55] k = k + 1 [L47] COND TRUE 1 [L48] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == k * b + c) [L49] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(a == y*r + x*p) [L50] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(b == x * q + y * s) [L51] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L52] COND TRUE !(c >= b) [L58] a = b [L59] b = c [L61] long long temp; [L62] temp = p [L63] p = q [L64] q = temp - q * k [L65] temp = r [L66] r = s [L67] s = temp - s * k [L41] COND TRUE 1 [L42] COND TRUE !(b != 0) [L71] CALL __VERIFIER_assert(q*x + s*y == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 427.6s, OverallIterations: 29, TraceHistogramMax: 33, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.1s, AutomataDifference: 306.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 2149 SdHoareTripleChecker+Valid, 226.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1976 mSDsluCounter, 8749 SdHoareTripleChecker+Invalid, 223.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7073 mSDsCounter, 4005 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30398 IncrementalHoareTripleChecker+Invalid, 34416 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4005 mSolverCounterUnsat, 1676 mSDtfsCounter, 30398 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6131 GetRequests, 5121 SyntacticMatches, 41 SemanticMatches, 969 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 11504 ImplicationChecksByTransitivity, 132.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1155occurred in iteration=27, InterpolantAutomatonStates: 631, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.8s AutomataMinimizationTime, 28 MinimizatonAttempts, 532 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 34.0s SatisfiabilityAnalysisTime, 69.8s InterpolantComputationTime, 3859 NumberOfCodeBlocks, 3292 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 5275 ConstructedInterpolants, 116 QuantifiedInterpolants, 59687 SizeOfPredicates, 322 NumberOfNonLiveVariables, 7294 ConjunctsInSsa, 1358 ConjunctsInUnsatCore, 43 InterpolantComputations, 4 PerfectInterpolantSequences, 30460/33187 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-02-18 17:23:14,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 17:23:16,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 17:23:16,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 17:23:16,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 17:23:16,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 17:23:16,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 17:23:16,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 17:23:16,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 17:23:16,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 17:23:16,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 17:23:16,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 17:23:16,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 17:23:16,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 17:23:16,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 17:23:16,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 17:23:16,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 17:23:16,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 17:23:16,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 17:23:16,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 17:23:16,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 17:23:16,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 17:23:16,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 17:23:16,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 17:23:16,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 17:23:16,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 17:23:16,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 17:23:16,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 17:23:16,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 17:23:16,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 17:23:16,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 17:23:16,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 17:23:16,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 17:23:16,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 17:23:16,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 17:23:16,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 17:23:16,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 17:23:16,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 17:23:16,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 17:23:16,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 17:23:16,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 17:23:16,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 17:23:16,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-18 17:23:16,656 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 17:23:16,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 17:23:16,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 17:23:16,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 17:23:16,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 17:23:16,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 17:23:16,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 17:23:16,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 17:23:16,660 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 17:23:16,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 17:23:16,661 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 17:23:16,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 17:23:16,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 17:23:16,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 17:23:16,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 17:23:16,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 17:23:16,662 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 17:23:16,662 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-18 17:23:16,662 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-18 17:23:16,662 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 17:23:16,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 17:23:16,663 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 17:23:16,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 17:23:16,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 17:23:16,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 17:23:16,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 17:23:16,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:23:16,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 17:23:16,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 17:23:16,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 17:23:16,665 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-18 17:23:16,665 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-18 17:23:16,665 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 17:23:16,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 17:23:16,666 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 17:23:16,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 17:23:16,666 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-18 17:23:16,666 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 17:23:16,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2023-02-18 17:23:16,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 17:23:16,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 17:23:16,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 17:23:16,940 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 17:23:16,940 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 17:23:16,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-02-18 17:23:17,964 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 17:23:18,140 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 17:23:18,141 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-02-18 17:23:18,146 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c25a44d6a/2215447cdf79491fa8e6ef94bdd9dc41/FLAG70a0b7ef7 [2023-02-18 17:23:18,164 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c25a44d6a/2215447cdf79491fa8e6ef94bdd9dc41 [2023-02-18 17:23:18,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 17:23:18,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 17:23:18,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 17:23:18,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 17:23:18,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 17:23:18,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@591f1d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18, skipping insertion in model container [2023-02-18 17:23:18,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 17:23:18,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 17:23:18,303 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2023-02-18 17:23:18,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:23:18,331 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 17:23:18,339 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2023-02-18 17:23:18,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 17:23:18,363 INFO L208 MainTranslator]: Completed translation [2023-02-18 17:23:18,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18 WrapperNode [2023-02-18 17:23:18,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 17:23:18,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 17:23:18,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 17:23:18,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 17:23:18,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,406 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2023-02-18 17:23:18,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 17:23:18,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 17:23:18,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 17:23:18,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 17:23:18,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,440 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 17:23:18,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 17:23:18,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 17:23:18,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 17:23:18,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (1/1) ... [2023-02-18 17:23:18,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 17:23:18,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 17:23:18,494 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 17:23:18,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 17:23:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-18 17:23:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 17:23:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 17:23:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 17:23:18,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 17:23:18,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 17:23:18,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 17:23:18,547 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 17:23:18,627 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 17:23:18,629 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 17:23:18,920 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 17:23:18,924 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 17:23:18,924 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 17:23:18,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:23:18 BoogieIcfgContainer [2023-02-18 17:23:18,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 17:23:18,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 17:23:18,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 17:23:18,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 17:23:18,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:23:18" (1/3) ... [2023-02-18 17:23:18,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abf35fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:23:18, skipping insertion in model container [2023-02-18 17:23:18,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:23:18" (2/3) ... [2023-02-18 17:23:18,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abf35fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:23:18, skipping insertion in model container [2023-02-18 17:23:18,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:23:18" (3/3) ... [2023-02-18 17:23:18,931 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2023-02-18 17:23:18,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 17:23:18,957 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 17:23:18,999 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 17:23:19,004 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;@9b83f6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 17:23:19,004 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 17:23:19,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 17:23:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 17:23:19,012 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:19,013 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:19,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2023-02-18 17:23:19,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:23:19,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961249324] [2023-02-18 17:23:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:19,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:23:19,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:23:19,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:23:19,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-18 17:23:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:23:19,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 17:23:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:23:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-18 17:23:19,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:23:19,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:23:19,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961249324] [2023-02-18 17:23:19,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961249324] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:23:19,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 17:23:19,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 17:23:19,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276787873] [2023-02-18 17:23:19,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:23:19,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 17:23:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:23:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 17:23:19,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 17:23:19,337 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 17:23:19,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:23:19,371 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2023-02-18 17:23:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 17:23:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-02-18 17:23:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:23:19,378 INFO L225 Difference]: With dead ends: 67 [2023-02-18 17:23:19,378 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 17:23:19,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 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 17:23:19,383 INFO L413 NwaCegarLoop]: 46 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, 46 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 17:23:19,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 17:23:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 17:23:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 17:23:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 17:23:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-02-18 17:23:19,418 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2023-02-18 17:23:19,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:19,419 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-02-18 17:23:19,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 17:23:19,419 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-02-18 17:23:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 17:23:19,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:19,421 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 17:23:19,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-02-18 17:23:19,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:23:19,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:19,633 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2023-02-18 17:23:19,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:23:19,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445513174] [2023-02-18 17:23:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:19,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:23:19,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:23:19,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:23:19,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-18 17:23:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:23:19,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 17:23:19,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:23:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 17:23:19,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:23:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 17:23:19,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:23:19,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445513174] [2023-02-18 17:23:19,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445513174] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:23:19,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:23:19,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2023-02-18 17:23:19,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035962358] [2023-02-18 17:23:19,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:23:19,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 17:23:19,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:23:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 17:23:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 17:23:19,977 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-18 17:23:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:23:23,436 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-02-18 17:23:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 17:23:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 40 [2023-02-18 17:23:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:23:23,437 INFO L225 Difference]: With dead ends: 48 [2023-02-18 17:23:23,437 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 17:23:23,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:23:23,439 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:23:23,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 115 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-02-18 17:23:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 17:23:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-18 17:23:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 17:23:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-18 17:23:23,448 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2023-02-18 17:23:23,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:23,448 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-18 17:23:23,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2023-02-18 17:23:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-18 17:23:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 17:23:23,453 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:23,453 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 17:23:23,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-02-18 17:23:23,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:23:23,654 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2023-02-18 17:23:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:23:23,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932214036] [2023-02-18 17:23:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:23,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:23:23,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:23:23,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:23:23,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-18 17:23:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:23:23,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 17:23:23,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:23:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 17:23:23,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:23:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:23:25,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:23:25,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932214036] [2023-02-18 17:23:25,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932214036] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:23:25,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:23:25,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-02-18 17:23:25,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142055132] [2023-02-18 17:23:25,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:23:25,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:23:25,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:23:25,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:23:25,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:23:25,578 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 17:23:28,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:23:31,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:23:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:23:32,554 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2023-02-18 17:23:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:23:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-18 17:23:32,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:23:32,562 INFO L225 Difference]: With dead ends: 46 [2023-02-18 17:23:32,562 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 17:23:32,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:23:32,563 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-02-18 17:23:32,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 137 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2023-02-18 17:23:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 17:23:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2023-02-18 17:23:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 17:23:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2023-02-18 17:23:32,576 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 41 [2023-02-18 17:23:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:32,582 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2023-02-18 17:23:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 17:23:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2023-02-18 17:23:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 17:23:32,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:32,586 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 17:23:32,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-02-18 17:23:32,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:23:32,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:32,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2023-02-18 17:23:32,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:23:32,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854550879] [2023-02-18 17:23:32,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:32,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:23:32,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:23:32,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:23:32,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-18 17:23:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:23:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 17:23:32,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:23:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 17:23:33,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:23:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:23:36,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:23:36,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854550879] [2023-02-18 17:23:36,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854550879] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:23:36,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:23:36,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-18 17:23:36,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505824948] [2023-02-18 17:23:36,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:23:36,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:23:36,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:23:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:23:36,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:23:36,509 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 17:23:43,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:23:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:23:46,982 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-02-18 17:23:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:23:47,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-02-18 17:23:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:23:47,024 INFO L225 Difference]: With dead ends: 54 [2023-02-18 17:23:47,024 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 17:23:47,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:23:47,025 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-02-18 17:23:47,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2023-02-18 17:23:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 17:23:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-18 17:23:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 17:23:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2023-02-18 17:23:47,035 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 46 [2023-02-18 17:23:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:23:47,036 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2023-02-18 17:23:47,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 17:23:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2023-02-18 17:23:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 17:23:47,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:23:47,037 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:23:47,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-02-18 17:23:47,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:23:47,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:23:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:23:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2023-02-18 17:23:47,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:23:47,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717478686] [2023-02-18 17:23:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:23:47,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:23:47,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:23:47,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:23:47,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-02-18 17:23:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:23:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 17:23:47,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:23:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 17:23:47,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:23:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-18 17:23:51,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:23:51,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717478686] [2023-02-18 17:23:51,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717478686] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:23:51,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:23:51,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-18 17:23:51,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127696314] [2023-02-18 17:23:51,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:23:51,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:23:51,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:23:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:23:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-18 17:23:51,076 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 17:23:54,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:23:58,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:24:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:24:02,803 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-02-18 17:24:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:24:02,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-18 17:24:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:24:02,820 INFO L225 Difference]: With dead ends: 58 [2023-02-18 17:24:02,820 INFO L226 Difference]: Without dead ends: 56 [2023-02-18 17:24:02,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-18 17:24:02,820 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-02-18 17:24:02,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2023-02-18 17:24:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-18 17:24:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-02-18 17:24:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 17:24:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2023-02-18 17:24:02,837 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51 [2023-02-18 17:24:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:24:02,839 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2023-02-18 17:24:02,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 17:24:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2023-02-18 17:24:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 17:24:02,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:24:02,844 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:24:02,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-02-18 17:24:03,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:24:03,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:24:03,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:24:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2023-02-18 17:24:03,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:24:03,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234118882] [2023-02-18 17:24:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:24:03,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:24:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:24:03,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:24:03,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-02-18 17:24:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:24:03,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 17:24:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:24:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-18 17:24:05,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:24:30,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:24:30,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234118882] [2023-02-18 17:24:30,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234118882] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:24:30,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [629517855] [2023-02-18 17:24:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:24:30,222 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-18 17:24:30,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-18 17:24:30,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-18 17:24:30,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-02-18 17:24:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:24:30,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 17:24:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:24:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 17:24:33,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 17:24:33,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [629517855] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 17:24:33,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:24:33,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 13 [2023-02-18 17:24:33,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049673565] [2023-02-18 17:24:33,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:24:33,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 17:24:33,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:24:33,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 17:24:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-02-18 17:24:33,470 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 17:24:46,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:24:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:24:46,766 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2023-02-18 17:24:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 17:24:46,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-02-18 17:24:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:24:46,782 INFO L225 Difference]: With dead ends: 62 [2023-02-18 17:24:46,782 INFO L226 Difference]: Without dead ends: 60 [2023-02-18 17:24:46,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-02-18 17:24:46,783 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-02-18 17:24:46,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2023-02-18 17:24:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-18 17:24:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-02-18 17:24:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 17:24:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2023-02-18 17:24:46,799 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 56 [2023-02-18 17:24:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:24:46,800 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2023-02-18 17:24:46,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 17:24:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2023-02-18 17:24:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 17:24:46,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:24:46,801 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:24:46,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-02-18 17:24:47,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2023-02-18 17:24:47,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-02-18 17:24:47,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:24:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:24:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash 815241237, now seen corresponding path program 1 times [2023-02-18 17:24:47,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:24:47,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56271867] [2023-02-18 17:24:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:24:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:24:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:24:47,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:24:47,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-02-18 17:24:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:24:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 17:24:47,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:24:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 17:24:48,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:24:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-18 17:24:52,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:24:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56271867] [2023-02-18 17:24:52,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56271867] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 17:24:52,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 17:24:52,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2023-02-18 17:24:52,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337332601] [2023-02-18 17:24:52,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 17:24:52,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 17:24:52,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:24:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 17:24:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-18 17:24:52,518 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 17:24:56,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:24:58,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:24:58,321 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-02-18 17:24:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 17:24:58,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 63 [2023-02-18 17:24:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:24:58,343 INFO L225 Difference]: With dead ends: 65 [2023-02-18 17:24:58,343 INFO L226 Difference]: Without dead ends: 63 [2023-02-18 17:24:58,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-02-18 17:24:58,344 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-02-18 17:24:58,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-02-18 17:24:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-18 17:24:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-02-18 17:24:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 17:24:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-18 17:24:58,355 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 63 [2023-02-18 17:24:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:24:58,356 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-18 17:24:58,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 17:24:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-18 17:24:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 17:24:58,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:24:58,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:24:58,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-02-18 17:24:58,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:24:58,576 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:24:58,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:24:58,577 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2023-02-18 17:24:58,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:24:58,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419260686] [2023-02-18 17:24:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:24:58,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:24:58,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:24:58,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:24:58,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-02-18 17:24:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:24:59,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 17:24:59,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:24:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-18 17:24:59,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:24:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-18 17:24:59,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:24:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419260686] [2023-02-18 17:24:59,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419260686] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:24:59,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:24:59,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-18 17:24:59,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643250724] [2023-02-18 17:24:59,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:24:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 17:24:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:24:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 17:24:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-02-18 17:24:59,760 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 17:25:08,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 17:25:10,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 17:25:15,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 17:25:18,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:25:18,187 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2023-02-18 17:25:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 17:25:18,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 65 [2023-02-18 17:25:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:25:18,208 INFO L225 Difference]: With dead ends: 114 [2023-02-18 17:25:18,208 INFO L226 Difference]: Without dead ends: 106 [2023-02-18 17:25:18,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-02-18 17:25:18,209 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 155 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2023-02-18 17:25:18,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 256 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 17.6s Time] [2023-02-18 17:25:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-18 17:25:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2023-02-18 17:25:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 17:25:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2023-02-18 17:25:18,241 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 65 [2023-02-18 17:25:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:25:18,242 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2023-02-18 17:25:18,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2023-02-18 17:25:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2023-02-18 17:25:18,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 17:25:18,243 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:25:18,243 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:25:18,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-02-18 17:25:18,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:25:18,449 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:25:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:25:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2023-02-18 17:25:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:25:18,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115077663] [2023-02-18 17:25:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 17:25:18,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:25:18,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:25:18,451 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:25:18,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-02-18 17:25:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 17:25:19,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 17:25:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:25:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-18 17:25:20,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:25:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-18 17:25:30,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:25:30,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115077663] [2023-02-18 17:25:30,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115077663] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:25:30,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:25:30,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2023-02-18 17:25:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110638250] [2023-02-18 17:25:30,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:25:30,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 17:25:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:25:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 17:25:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-18 17:25:30,073 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-18 17:25:42,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:26:03,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:26:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:26:12,018 INFO L93 Difference]: Finished difference Result 98 states and 131 transitions. [2023-02-18 17:26:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 17:26:12,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 71 [2023-02-18 17:26:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:26:12,055 INFO L225 Difference]: With dead ends: 98 [2023-02-18 17:26:12,055 INFO L226 Difference]: Without dead ends: 94 [2023-02-18 17:26:12,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-02-18 17:26:12,056 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 51 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 79 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2023-02-18 17:26:12,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 146 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 469 Invalid, 2 Unknown, 0 Unchecked, 32.8s Time] [2023-02-18 17:26:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-18 17:26:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2023-02-18 17:26:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-02-18 17:26:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2023-02-18 17:26:12,076 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 71 [2023-02-18 17:26:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:26:12,077 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2023-02-18 17:26:12,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-18 17:26:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2023-02-18 17:26:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 17:26:12,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:26:12,078 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:26:12,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-02-18 17:26:12,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:26:12,283 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:26:12,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:26:12,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2023-02-18 17:26:12,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:26:12,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808618274] [2023-02-18 17:26:12,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 17:26:12,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:26:12,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:26:12,285 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:26:12,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-02-18 17:26:12,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 17:26:12,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:26:12,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 17:26:12,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:26:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-02-18 17:26:13,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:26:19,259 WARN L837 $PredicateComparison]: unable to prove that (= |c_ULTIMATE.start_main_~c~0#1| (bvadd (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|) (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (bvmul ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|) (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))))) is different from false [2023-02-18 17:26:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 4 not checked. [2023-02-18 17:26:24,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:26:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808618274] [2023-02-18 17:26:24,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808618274] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 17:26:24,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:26:24,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2023-02-18 17:26:24,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607807423] [2023-02-18 17:26:24,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:26:24,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 17:26:24,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:26:24,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 17:26:24,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2023-02-18 17:26:24,111 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2023-02-18 17:26:52,311 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (and (= |c_ULTIMATE.start_main_~b~0#1| (bvadd (bvmul .cse0 |c_ULTIMATE.start_main_~q~0#1|) (bvmul .cse1 |c_ULTIMATE.start_main_~s~0#1|))) (= |c_ULTIMATE.start_main_~a~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| (_ bv0 64))))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| (_ bv0 64))))))) (bvsge |c_ULTIMATE.start_main_~y~0#1| (_ bv0 32)) (bvsle |c_ULTIMATE.start_main_~y~0#1| (_ bv10 32)) (bvsge |c_ULTIMATE.start_main_~x~0#1| (_ bv0 32)) (bvsle |c_ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (= |c_ULTIMATE.start_main_~c~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))))))) is different from true [2023-02-18 17:26:54,381 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (and (= |c_ULTIMATE.start_main_~b~0#1| (bvadd (bvmul .cse0 |c_ULTIMATE.start_main_~q~0#1|) (bvmul .cse1 |c_ULTIMATE.start_main_~s~0#1|))) (= |c_ULTIMATE.start_main_~c~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))))))) is different from false [2023-02-18 17:26:56,450 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (and (= |c_ULTIMATE.start_main_~b~0#1| (bvadd (bvmul .cse0 |c_ULTIMATE.start_main_~q~0#1|) (bvmul .cse1 |c_ULTIMATE.start_main_~s~0#1|))) (= |c_ULTIMATE.start_main_~c~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))))))) is different from true [2023-02-18 17:26:58,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:27:00,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:27:08,508 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (and (= |c_ULTIMATE.start_main_~a~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| (_ bv0 64))))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| (_ bv0 64))))))) (bvsge |c_ULTIMATE.start_main_~y~0#1| (_ bv0 32)) (bvsle |c_ULTIMATE.start_main_~y~0#1| (_ bv10 32)) (bvsge |c_ULTIMATE.start_main_~x~0#1| (_ bv0 32)) (bvsle |c_ULTIMATE.start_main_~x~0#1| (_ bv10 32)) (= |c_ULTIMATE.start_main_~c~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))))))) is different from true [2023-02-18 17:27:14,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:27:16,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:27:21,329 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (and (= |c_ULTIMATE.start_main_~a~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| (_ bv0 64))))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| (_ bv0 64))))))) (= |c_ULTIMATE.start_main_~c~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))))))) is different from false [2023-02-18 17:27:23,376 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (and (= |c_ULTIMATE.start_main_~a~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| (_ bv0 64))))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| (_ bv0 64))))))) (= |c_ULTIMATE.start_main_~c~0#1| (bvadd (bvmul .cse0 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (bvmul .cse1 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))))))) is different from true [2023-02-18 17:27:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 17:27:23,381 INFO L93 Difference]: Finished difference Result 161 states and 219 transitions. [2023-02-18 17:27:23,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 17:27:23,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 76 [2023-02-18 17:27:23,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 17:27:23,382 INFO L225 Difference]: With dead ends: 161 [2023-02-18 17:27:23,382 INFO L226 Difference]: Without dead ends: 159 [2023-02-18 17:27:23,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 124 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=115, Invalid=450, Unknown=7, NotChecked=240, Total=812 [2023-02-18 17:27:23,383 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 63 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2023-02-18 17:27:23,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 279 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 393 Invalid, 2 Unknown, 152 Unchecked, 31.6s Time] [2023-02-18 17:27:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-18 17:27:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2023-02-18 17:27:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 89 states have internal predecessors, (102), 54 states have call successors, (54), 11 states have call predecessors, (54), 11 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2023-02-18 17:27:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 209 transitions. [2023-02-18 17:27:23,413 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 209 transitions. Word has length 76 [2023-02-18 17:27:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 17:27:23,413 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 209 transitions. [2023-02-18 17:27:23,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 13 states have internal predecessors, (36), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2023-02-18 17:27:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 209 transitions. [2023-02-18 17:27:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-18 17:27:23,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 17:27:23,423 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 17:27:23,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-02-18 17:27:23,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:27:23,638 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 17:27:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 17:27:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2023-02-18 17:27:23,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-18 17:27:23,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116784928] [2023-02-18 17:27:23,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:27:23,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-18 17:27:23,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-18 17:27:23,640 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-18 17:27:23,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-02-18 17:27:29,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 17:27:29,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:27:29,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 17:27:29,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:27:37,287 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (and (= |c_ULTIMATE.start_main_~xy~0#1| (bvmul .cse0 .cse1)) (= |c_ULTIMATE.start_main_~c~0#1| .cse0) (bvslt |c_ULTIMATE.start_main_~yy~0#1| (_ bv2147483647 64)) (= |c_ULTIMATE.start_main_~b~0#1| .cse1) (= |c_ULTIMATE.start_main_~r~0#1| (_ bv0 64)) (= |c_ULTIMATE.start_main_~yy~0#1| (bvmul .cse1 .cse1)) (= |c_ULTIMATE.start_main_~k~0#1| (_ bv0 64)) (= |c_ULTIMATE.start_main_~p~0#1| (_ bv1 64)) (not (= (_ bv0 64) |c_ULTIMATE.start_main_~b~0#1|)) (bvsge |c_ULTIMATE.start_main_~x~0#1| (_ bv0 32)) (bvsle |c_ULTIMATE.start_main_~x~0#1| (_ bv10 32)))) is different from false [2023-02-18 17:28:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 102 trivial. 5 not checked. [2023-02-18 17:28:09,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:29:49,300 WARN L859 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~q~0#1| (_ BitVec 64)) (|ULTIMATE.start_main_~s~0#1| (_ BitVec 64))) (let ((.cse3 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (.cse4 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))))) (let ((.cse0 (bvadd (bvmul .cse3 .cse1) (bvmul .cse4 .cse2)))) (or (= (_ bv0 64) .cse0) (= (_ bv0 64) (bvadd (bvadd (bvadd (bvadd (bvadd (bvmul .cse1 |c_ULTIMATE.start_main_~xy~0#1|) (bvmul .cse2 |c_ULTIMATE.start_main_~yy~0#1|)) (bvneg (bvmul .cse1 .cse3))) (bvneg (bvmul .cse0 .cse4))) (bvneg (bvmul .cse2 .cse4))) .cse0)) (not (= .cse0 |c_ULTIMATE.start_main_~c~0#1|)))))) is different from true [2023-02-18 17:29:51,553 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~q~0#1| (_ BitVec 64)) (|ULTIMATE.start_main_~s~0#1| (_ BitVec 64))) (let ((.cse3 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 (bvadd |c_ULTIMATE.start_main_~p~0#1| (bvneg (bvmul |ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (.cse4 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (bvadd |c_ULTIMATE.start_main_~r~0#1| (bvneg (bvmul |ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))))) (let ((.cse0 (bvadd (bvmul .cse3 .cse1) (bvmul .cse4 .cse2)))) (or (= (_ bv0 64) .cse0) (= (_ bv0 64) (bvadd (bvadd (bvadd (bvadd (bvadd (bvmul .cse1 |c_ULTIMATE.start_main_~xy~0#1|) (bvmul .cse2 |c_ULTIMATE.start_main_~yy~0#1|)) (bvneg (bvmul .cse1 .cse3))) (bvneg (bvmul .cse0 .cse4))) (bvneg (bvmul .cse2 .cse4))) .cse0)) (not (= .cse0 |c_ULTIMATE.start_main_~c~0#1|)))))) (bvsge |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|)) is different from true [2023-02-18 17:29:51,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-18 17:29:51,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116784928] [2023-02-18 17:29:51,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116784928] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:29:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [745505866] [2023-02-18 17:29:51,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 17:29:51,573 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-02-18 17:29:51,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-02-18 17:29:51,574 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-02-18 17:29:51,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-02-18 17:29:53,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 17:29:53,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 17:29:53,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 17:29:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 17:29:55,461 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (and (= |c_ULTIMATE.start_main_~xy~0#1| (bvmul .cse0 .cse1)) (bvslt |c_ULTIMATE.start_main_~yy~0#1| (_ bv2147483647 64)) (= |c_ULTIMATE.start_main_~b~0#1| .cse1) (= |c_ULTIMATE.start_main_~r~0#1| (_ bv0 64)) (= |c_ULTIMATE.start_main_~a~0#1| .cse0) (= |c_ULTIMATE.start_main_~yy~0#1| (bvmul .cse1 .cse1)) (= |c_ULTIMATE.start_main_~p~0#1| (_ bv1 64)) (bvsge |c_ULTIMATE.start_main_~x~0#1| (_ bv0 32)) (bvsle |c_ULTIMATE.start_main_~x~0#1| (_ bv10 32)))) is different from false [2023-02-18 17:29:57,652 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ sign_extend 32) |c_ULTIMATE.start_main_~x~0#1|)) (.cse1 ((_ sign_extend 32) |c_ULTIMATE.start_main_~y~0#1|))) (and (= |c_ULTIMATE.start_main_~xy~0#1| (bvmul .cse0 .cse1)) (= |c_ULTIMATE.start_main_~c~0#1| .cse0) (bvslt |c_ULTIMATE.start_main_~yy~0#1| (_ bv2147483647 64)) (= |c_ULTIMATE.start_main_~b~0#1| .cse1) (= |c_ULTIMATE.start_main_~r~0#1| (_ bv0 64)) (= |c_ULTIMATE.start_main_~yy~0#1| (bvmul .cse1 .cse1)) (= |c_ULTIMATE.start_main_~k~0#1| (_ bv0 64)) (= |c_ULTIMATE.start_main_~p~0#1| (_ bv1 64)) (bvsge |c_ULTIMATE.start_main_~x~0#1| (_ bv0 32)) (bvsle |c_ULTIMATE.start_main_~x~0#1| (_ bv10 32)))) is different from false [2023-02-18 17:30:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 7 not checked. [2023-02-18 17:30:19,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 17:30:23,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [745505866] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 17:30:23,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 17:30:23,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2023-02-18 17:30:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561702637] [2023-02-18 17:30:23,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 17:30:23,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 17:30:23,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-18 17:30:23,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 17:30:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=277, Unknown=19, NotChecked=190, Total=552 [2023-02-18 17:30:23,047 INFO L87 Difference]: Start difference. First operand 153 states and 209 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2023-02-18 17:30:33,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 17:30:35,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 17:30:37,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []