./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/egcd2-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:02:43,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:02:43,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:02:44,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:02:44,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:02:44,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:02:44,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:02:44,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:02:44,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:02:44,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:02:44,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:02:44,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:02:44,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:02:44,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:02:44,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:02:44,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:02:44,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:02:44,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:02:44,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:02:44,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:02:44,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:02:44,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:02:44,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:02:44,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:02:44,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:02:44,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:02:44,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:02:44,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:02:44,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:02:44,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:02:44,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:02:44,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:02:44,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:02:44,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:02:44,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:02:44,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:02:44,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:02:44,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:02:44,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:02:44,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:02:44,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:02:44,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:02:44,068 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:02:44,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:02:44,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:02:44,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:02:44,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:02:44,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:02:44,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:02:44,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:02:44,071 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:02:44,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:02:44,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:02:44,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:02:44,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:02:44,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:02:44,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:02:44,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:02:44,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:02:44,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:02:44,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:02:44,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:02:44,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:02:44,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:02:44,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:02:44,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:02:44,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:02:44,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:02:44,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:02:44,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:02:44,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:02:44,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:02:44,076 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:02:44,076 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:02:44,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:02:44,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:02:44,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2021-12-17 11:02:44,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:02:44,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:02:44,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:02:44,254 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:02:44,257 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:02:44,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2021-12-17 11:02:44,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c0b4621b/eeaf9b9c08964a18b42df207bf2fd23f/FLAG6e795f7b6 [2021-12-17 11:02:44,610 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:02:44,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2021-12-17 11:02:44,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c0b4621b/eeaf9b9c08964a18b42df207bf2fd23f/FLAG6e795f7b6 [2021-12-17 11:02:45,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c0b4621b/eeaf9b9c08964a18b42df207bf2fd23f [2021-12-17 11:02:45,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:02:45,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:02:45,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:02:45,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:02:45,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:02:45,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183561bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45, skipping insertion in model container [2021-12-17 11:02:45,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:02:45,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:02:45,190 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2021-12-17 11:02:45,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:02:45,206 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:02:45,215 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2021-12-17 11:02:45,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:02:45,243 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:02:45,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45 WrapperNode [2021-12-17 11:02:45,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:02:45,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:02:45,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:02:45,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:02:45,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,272 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2021-12-17 11:02:45,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:02:45,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:02:45,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:02:45,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:02:45,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:02:45,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:02:45,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:02:45,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:02:45,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (1/1) ... [2021-12-17 11:02:45,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:02:45,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:45,336 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) [2021-12-17 11:02:45,353 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 [2021-12-17 11:02:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:02:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 11:02:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 11:02:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:02:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:02:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:02:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:02:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:02:45,407 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:02:45,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:02:45,507 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:02:45,511 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:02:45,511 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 11:02:45,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:02:45 BoogieIcfgContainer [2021-12-17 11:02:45,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:02:45,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:02:45,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:02:45,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:02:45,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:02:45" (1/3) ... [2021-12-17 11:02:45,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1127a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:02:45, skipping insertion in model container [2021-12-17 11:02:45,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:02:45" (2/3) ... [2021-12-17 11:02:45,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1127a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:02:45, skipping insertion in model container [2021-12-17 11:02:45,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:02:45" (3/3) ... [2021-12-17 11:02:45,539 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2021-12-17 11:02:45,542 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:02:45,547 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:02:45,586 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:02:45,598 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 11:02:45,598 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:02:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 11:02:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 11:02:45,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:45,617 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:45,618 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:45,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:45,622 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2021-12-17 11:02:45,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:45,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823121657] [2021-12-17 11:02:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:45,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 11:02:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 11:02:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:45,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 11:02:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:45,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 11:02:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 11:02:45,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:45,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823121657] [2021-12-17 11:02:45,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823121657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:02:45,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:02:45,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:02:45,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223440270] [2021-12-17 11:02:45,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:02:45,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:02:45,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:45,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:02:45,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:02:45,851 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:02:45,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:45,872 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2021-12-17 11:02:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:02:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-12-17 11:02:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:45,880 INFO L225 Difference]: With dead ends: 61 [2021-12-17 11:02:45,880 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 11:02:45,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:02:45,887 INFO L933 BasicCegarLoop]: 41 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, 41 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 [2021-12-17 11:02:45,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:02:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 11:02:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-17 11:02:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 11:02:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2021-12-17 11:02:45,930 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2021-12-17 11:02:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:45,931 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2021-12-17 11:02:45,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:02:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2021-12-17 11:02:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 11:02:45,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:45,933 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:45,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:02:45,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:45,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2021-12-17 11:02:45,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091185241] [2021-12-17 11:02:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:45,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:45,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:02:45,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279169740] [2021-12-17 11:02:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:45,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:45,963 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) [2021-12-17 11:02:45,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:02:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:46,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:02:46,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 11:02:46,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 11:02:46,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:46,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091185241] [2021-12-17 11:02:46,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:02:46,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279169740] [2021-12-17 11:02:46,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279169740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:02:46,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:02:46,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-17 11:02:46,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078753620] [2021-12-17 11:02:46,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:46,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:02:46,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:02:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 11:02:46,269 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:02:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:46,350 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-12-17 11:02:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:02:46,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-17 11:02:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:46,352 INFO L225 Difference]: With dead ends: 45 [2021-12-17 11:02:46,352 INFO L226 Difference]: Without dead ends: 37 [2021-12-17 11:02:46,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:02:46,354 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:46,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 124 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:02:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-17 11:02:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-12-17 11:02:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 11:02:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-12-17 11:02:46,365 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 29 [2021-12-17 11:02:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:46,366 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-12-17 11:02:46,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 11:02:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-12-17 11:02:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 11:02:46,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:46,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:46,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:46,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:46,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2021-12-17 11:02:46,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:46,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153119259] [2021-12-17 11:02:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:46,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:46,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:02:46,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328772325] [2021-12-17 11:02:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:46,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:46,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:46,599 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) [2021-12-17 11:02:46,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:02:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:46,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 11:02:46,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 11:02:46,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 11:02:46,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153119259] [2021-12-17 11:02:46,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:02:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328772325] [2021-12-17 11:02:46,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328772325] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:46,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:02:46,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-17 11:02:46,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427546332] [2021-12-17 11:02:46,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:02:46,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:02:46,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:02:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:02:46,820 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 11:02:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:46,855 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-12-17 11:02:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:02:46,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-17 11:02:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:46,856 INFO L225 Difference]: With dead ends: 36 [2021-12-17 11:02:46,856 INFO L226 Difference]: Without dead ends: 34 [2021-12-17 11:02:46,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:02:46,857 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:46,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 110 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:02:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-17 11:02:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-17 11:02:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 11:02:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-17 11:02:46,862 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2021-12-17 11:02:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:46,863 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-17 11:02:46,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 11:02:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-17 11:02:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 11:02:46,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:46,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:46,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:47,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 11:02:47,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:47,076 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2021-12-17 11:02:47,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:47,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257084314] [2021-12-17 11:02:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:47,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:47,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:02:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356299641] [2021-12-17 11:02:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:47,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:47,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:47,088 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) [2021-12-17 11:02:47,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:02:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 11:02:47,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 11:02:47,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 11:02:47,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:47,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257084314] [2021-12-17 11:02:47,415 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:02:47,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356299641] [2021-12-17 11:02:47,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356299641] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:47,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:02:47,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-17 11:02:47,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150169075] [2021-12-17 11:02:47,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:02:47,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:02:47,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:02:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:02:47,417 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 11:02:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:47,453 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-12-17 11:02:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:02:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-12-17 11:02:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:47,455 INFO L225 Difference]: With dead ends: 47 [2021-12-17 11:02:47,455 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 11:02:47,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:02:47,456 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:47,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 137 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:02:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 11:02:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-12-17 11:02:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 11:02:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-12-17 11:02:47,462 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 35 [2021-12-17 11:02:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:47,462 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-12-17 11:02:47,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 11:02:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-12-17 11:02:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 11:02:47,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:47,463 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:47,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 11:02:47,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:47,679 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:47,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2062939834, now seen corresponding path program 1 times [2021-12-17 11:02:47,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:47,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716150389] [2021-12-17 11:02:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:47,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:47,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:02:47,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822519925] [2021-12-17 11:02:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:47,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:47,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:47,704 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) [2021-12-17 11:02:47,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:02:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:47,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 11:02:47,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 11:02:47,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 11:02:48,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:48,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716150389] [2021-12-17 11:02:48,060 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:02:48,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822519925] [2021-12-17 11:02:48,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822519925] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:48,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:02:48,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-17 11:02:48,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466948219] [2021-12-17 11:02:48,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:02:48,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:02:48,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:48,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:02:48,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:02:48,061 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 11:02:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:48,094 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-12-17 11:02:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:02:48,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-12-17 11:02:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:48,095 INFO L225 Difference]: With dead ends: 51 [2021-12-17 11:02:48,095 INFO L226 Difference]: Without dead ends: 49 [2021-12-17 11:02:48,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:02:48,096 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:48,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:02:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-17 11:02:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-12-17 11:02:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 11:02:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2021-12-17 11:02:48,101 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 40 [2021-12-17 11:02:48,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:48,101 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2021-12-17 11:02:48,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 11:02:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2021-12-17 11:02:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 11:02:48,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:48,102 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:48,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:48,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:48,303 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:48,303 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2021-12-17 11:02:48,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:48,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702442044] [2021-12-17 11:02:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:48,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:48,309 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:02:48,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588343255] [2021-12-17 11:02:48,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:48,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:48,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:48,310 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) [2021-12-17 11:02:48,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:02:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 11:02:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 11:02:48,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:48,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702442044] [2021-12-17 11:02:48,613 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:02:48,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588343255] [2021-12-17 11:02:48,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588343255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:02:48,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:02:48,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 11:02:48,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252615723] [2021-12-17 11:02:48,614 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:48,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:02:48,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:48,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:02:48,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:02:48,615 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 11:02:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:48,695 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-12-17 11:02:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:02:48,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-12-17 11:02:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:48,697 INFO L225 Difference]: With dead ends: 55 [2021-12-17 11:02:48,697 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 11:02:48,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:02:48,697 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:48,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 110 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:02:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 11:02:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-12-17 11:02:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 11:02:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-17 11:02:48,703 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 45 [2021-12-17 11:02:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:48,703 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-17 11:02:48,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 11:02:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-17 11:02:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 11:02:48,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:48,704 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:48,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:48,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:48,911 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:48,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1721617041, now seen corresponding path program 1 times [2021-12-17 11:02:48,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:48,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444831799] [2021-12-17 11:02:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:48,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:48,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:02:48,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327425286] [2021-12-17 11:02:48,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:48,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:48,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:48,921 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) [2021-12-17 11:02:48,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 11:02:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:48,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 11:02:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 11:02:49,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 11:02:49,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:49,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444831799] [2021-12-17 11:02:49,175 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:02:49,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327425286] [2021-12-17 11:02:49,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327425286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:02:49,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:02:49,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-17 11:02:49,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706441855] [2021-12-17 11:02:49,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:49,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 11:02:49,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:49,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 11:02:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:02:49,178 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 11:02:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:49,298 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2021-12-17 11:02:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 11:02:49,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-12-17 11:02:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:49,302 INFO L225 Difference]: With dead ends: 99 [2021-12-17 11:02:49,302 INFO L226 Difference]: Without dead ends: 91 [2021-12-17 11:02:49,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-17 11:02:49,305 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:49,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 335 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:02:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-17 11:02:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-12-17 11:02:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 11:02:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2021-12-17 11:02:49,329 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 54 [2021-12-17 11:02:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:49,330 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2021-12-17 11:02:49,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 11:02:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2021-12-17 11:02:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 11:02:49,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:49,332 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2021-12-17 11:02:49,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:49,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:49,547 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash -653850053, now seen corresponding path program 1 times [2021-12-17 11:02:49,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:49,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977869372] [2021-12-17 11:02:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:49,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:49,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:02:49,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461262944] [2021-12-17 11:02:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:49,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:49,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:49,558 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) [2021-12-17 11:02:49,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 11:02:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:02:49,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 11:02:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 11:02:49,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 11:02:49,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:49,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977869372] [2021-12-17 11:02:49,854 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:02:49,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461262944] [2021-12-17 11:02:49,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461262944] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:02:49,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:02:49,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-12-17 11:02:49,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961326121] [2021-12-17 11:02:49,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:49,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 11:02:49,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 11:02:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:02:49,856 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-17 11:02:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:50,039 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2021-12-17 11:02:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 11:02:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2021-12-17 11:02:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:50,042 INFO L225 Difference]: With dead ends: 125 [2021-12-17 11:02:50,042 INFO L226 Difference]: Without dead ends: 121 [2021-12-17 11:02:50,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-12-17 11:02:50,043 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 36 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:50,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 231 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:02:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-17 11:02:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2021-12-17 11:02:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 11:02:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2021-12-17 11:02:50,053 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 60 [2021-12-17 11:02:50,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:50,053 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2021-12-17 11:02:50,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-17 11:02:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2021-12-17 11:02:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 11:02:50,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:50,054 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:50,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:50,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:50,271 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1044201731, now seen corresponding path program 2 times [2021-12-17 11:02:50,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:50,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505085470] [2021-12-17 11:02:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:50,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:50,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:02:50,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776562900] [2021-12-17 11:02:50,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:02:50,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:50,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:50,278 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) [2021-12-17 11:02:50,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 11:02:50,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:02:50,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:02:50,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 11:02:50,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 11:02:50,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:02:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 11:02:50,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:02:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505085470] [2021-12-17 11:02:50,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:02:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776562900] [2021-12-17 11:02:50,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776562900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:02:50,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:02:50,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-12-17 11:02:50,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000741789] [2021-12-17 11:02:50,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:02:50,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 11:02:50,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:02:50,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 11:02:50,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-17 11:02:50,845 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-17 11:02:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:02:51,781 INFO L93 Difference]: Finished difference Result 121 states and 160 transitions. [2021-12-17 11:02:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 11:02:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 65 [2021-12-17 11:02:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:02:51,783 INFO L225 Difference]: With dead ends: 121 [2021-12-17 11:02:51,783 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 11:02:51,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-12-17 11:02:51,783 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 40 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 11:02:51,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 168 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 11:02:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 11:02:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-12-17 11:02:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 11:02:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2021-12-17 11:02:51,794 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 65 [2021-12-17 11:02:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:02:51,794 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2021-12-17 11:02:51,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-17 11:02:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2021-12-17 11:02:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 11:02:51,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:02:51,795 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:02:51,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 11:02:52,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 11:02:52,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:02:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:02:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash 635379451, now seen corresponding path program 3 times [2021-12-17 11:02:52,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:02:52,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205800276] [2021-12-17 11:02:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:02:52,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:02:52,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:02:52,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309420164] [2021-12-17 11:02:52,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:02:52,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:02:52,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:02:52,024 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) [2021-12-17 11:02:52,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 11:02:52,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 11:02:52,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:02:52,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-17 11:02:52,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:02:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 11:02:53,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:04,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:04,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205800276] [2021-12-17 11:03:04,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:04,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309420164] [2021-12-17 11:03:04,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309420164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:03:04,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:03:04,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-17 11:03:04,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187084588] [2021-12-17 11:03:04,516 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:04,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 11:03:04,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:04,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 11:03:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-12-17 11:03:04,517 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-17 11:03:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:05,855 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2021-12-17 11:03:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 11:03:05,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2021-12-17 11:03:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:05,857 INFO L225 Difference]: With dead ends: 137 [2021-12-17 11:03:05,857 INFO L226 Difference]: Without dead ends: 135 [2021-12-17 11:03:05,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-12-17 11:03:05,858 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:05,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 217 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 11:03:05,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-17 11:03:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-12-17 11:03:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-17 11:03:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2021-12-17 11:03:05,872 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 70 [2021-12-17 11:03:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:05,873 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2021-12-17 11:03:05,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-17 11:03:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2021-12-17 11:03:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 11:03:05,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:05,874 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:05,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:06,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 11:03:06,080 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:06,080 INFO L85 PathProgramCache]: Analyzing trace with hash -375209714, now seen corresponding path program 1 times [2021-12-17 11:03:06,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:06,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13289315] [2021-12-17 11:03:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:06,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:06,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:06,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984189584] [2021-12-17 11:03:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:06,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:06,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:06,087 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) [2021-12-17 11:03:06,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 11:03:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:06,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 11:03:06,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-17 11:03:06,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-17 11:03:07,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:07,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13289315] [2021-12-17 11:03:07,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:07,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984189584] [2021-12-17 11:03:07,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984189584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:07,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:03:07,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-17 11:03:07,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860737579] [2021-12-17 11:03:07,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:07,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 11:03:07,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:07,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 11:03:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-17 11:03:07,064 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-17 11:03:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:09,193 INFO L93 Difference]: Finished difference Result 201 states and 265 transitions. [2021-12-17 11:03:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 11:03:09,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 76 [2021-12-17 11:03:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:09,195 INFO L225 Difference]: With dead ends: 201 [2021-12-17 11:03:09,195 INFO L226 Difference]: Without dead ends: 193 [2021-12-17 11:03:09,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 11:03:09,196 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 68 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:09,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 250 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 11:03:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-17 11:03:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 155. [2021-12-17 11:03:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 92 states have internal predecessors, (102), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (47), 46 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-17 11:03:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 197 transitions. [2021-12-17 11:03:09,222 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 197 transitions. Word has length 76 [2021-12-17 11:03:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:09,223 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 197 transitions. [2021-12-17 11:03:09,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-17 11:03:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 197 transitions. [2021-12-17 11:03:09,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 11:03:09,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:09,224 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2021-12-17 11:03:09,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:09,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 11:03:09,441 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1261079706, now seen corresponding path program 1 times [2021-12-17 11:03:09,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:09,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685144748] [2021-12-17 11:03:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:09,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:09,447 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:09,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578816025] [2021-12-17 11:03:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:09,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:09,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:09,448 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) [2021-12-17 11:03:09,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 11:03:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:03:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 11:03:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 84 proven. 40 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-17 11:03:10,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:18,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:18,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685144748] [2021-12-17 11:03:18,627 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:18,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578816025] [2021-12-17 11:03:18,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578816025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:03:18,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:03:18,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-17 11:03:18,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805875936] [2021-12-17 11:03:18,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:18,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 11:03:18,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 11:03:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-12-17 11:03:18,628 INFO L87 Difference]: Start difference. First operand 155 states and 197 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-17 11:03:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:21,174 INFO L93 Difference]: Finished difference Result 170 states and 213 transitions. [2021-12-17 11:03:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 11:03:21,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-12-17 11:03:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:21,176 INFO L225 Difference]: With dead ends: 170 [2021-12-17 11:03:21,176 INFO L226 Difference]: Without dead ends: 168 [2021-12-17 11:03:21,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 110 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-12-17 11:03:21,177 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:21,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 257 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 11:03:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-17 11:03:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2021-12-17 11:03:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 95 states have internal predecessors, (105), 48 states have call successors, (48), 17 states have call predecessors, (48), 17 states have return successors, (47), 46 states have call predecessors, (47), 47 states have call successors, (47) [2021-12-17 11:03:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 200 transitions. [2021-12-17 11:03:21,191 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 200 transitions. Word has length 92 [2021-12-17 11:03:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:21,192 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 200 transitions. [2021-12-17 11:03:21,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-12-17 11:03:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 200 transitions. [2021-12-17 11:03:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 11:03:21,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:21,193 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2021-12-17 11:03:21,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:21,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 11:03:21,410 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1991503352, now seen corresponding path program 4 times [2021-12-17 11:03:21,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:21,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230556138] [2021-12-17 11:03:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:21,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:21,416 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:21,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129741265] [2021-12-17 11:03:21,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 11:03:21,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:21,417 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) [2021-12-17 11:03:21,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 11:03:21,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 11:03:21,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:03:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:03:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-17 11:03:21,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:03:21,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:21,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230556138] [2021-12-17 11:03:21,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:21,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129741265] [2021-12-17 11:03:21,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129741265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:03:21,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:03:21,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:03:21,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891002815] [2021-12-17 11:03:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:03:21,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:03:21,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:03:21,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:03:21,568 INFO L87 Difference]: Start difference. First operand 159 states and 200 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 11:03:21,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:21,625 INFO L93 Difference]: Finished difference Result 208 states and 262 transitions. [2021-12-17 11:03:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:03:21,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2021-12-17 11:03:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:21,627 INFO L225 Difference]: With dead ends: 208 [2021-12-17 11:03:21,627 INFO L226 Difference]: Without dead ends: 167 [2021-12-17 11:03:21,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 11:03:21,628 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:21,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 147 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:03:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-17 11:03:21,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-12-17 11:03:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 97 states have internal predecessors, (106), 53 states have call successors, (53), 17 states have call predecessors, (53), 17 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-17 11:03:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 211 transitions. [2021-12-17 11:03:21,646 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 211 transitions. Word has length 95 [2021-12-17 11:03:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:21,646 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 211 transitions. [2021-12-17 11:03:21,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-17 11:03:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 211 transitions. [2021-12-17 11:03:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 11:03:21,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:21,648 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:21,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:21,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 11:03:21,850 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash -918263559, now seen corresponding path program 2 times [2021-12-17 11:03:21,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:21,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654592433] [2021-12-17 11:03:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:21,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:21,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:21,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076332634] [2021-12-17 11:03:21,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:03:21,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:21,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:21,868 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) [2021-12-17 11:03:21,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 11:03:21,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:03:21,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:03:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-17 11:03:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 75 proven. 98 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-12-17 11:03:22,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:32,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:32,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654592433] [2021-12-17 11:03:32,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:32,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076332634] [2021-12-17 11:03:32,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076332634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:03:32,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:03:32,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-17 11:03:32,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803080992] [2021-12-17 11:03:32,191 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:32,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 11:03:32,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 11:03:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=320, Unknown=1, NotChecked=0, Total=420 [2021-12-17 11:03:32,192 INFO L87 Difference]: Start difference. First operand 167 states and 211 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-12-17 11:03:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:03:33,038 INFO L93 Difference]: Finished difference Result 214 states and 273 transitions. [2021-12-17 11:03:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 11:03:33,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 114 [2021-12-17 11:03:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:03:33,039 INFO L225 Difference]: With dead ends: 214 [2021-12-17 11:03:33,039 INFO L226 Difference]: Without dead ends: 212 [2021-12-17 11:03:33,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=123, Invalid=428, Unknown=1, NotChecked=0, Total=552 [2021-12-17 11:03:33,040 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 11:03:33,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 234 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 11:03:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-17 11:03:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 177. [2021-12-17 11:03:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 101 states have (on average 1.108910891089109) internal successors, (112), 102 states have internal predecessors, (112), 57 states have call successors, (57), 18 states have call predecessors, (57), 18 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2021-12-17 11:03:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 225 transitions. [2021-12-17 11:03:33,059 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 225 transitions. Word has length 114 [2021-12-17 11:03:33,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:03:33,059 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 225 transitions. [2021-12-17 11:03:33,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-12-17 11:03:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 225 transitions. [2021-12-17 11:03:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 11:03:33,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:03:33,061 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:03:33,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 11:03:33,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 11:03:33,264 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:03:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:03:33,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1051373609, now seen corresponding path program 3 times [2021-12-17 11:03:33,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:03:33,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286085625] [2021-12-17 11:03:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:03:33,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:03:33,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:03:33,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973825846] [2021-12-17 11:03:33,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:03:33,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:03:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:03:33,271 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) [2021-12-17 11:03:33,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 11:03:33,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 11:03:33,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:03:33,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-17 11:03:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:03:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 71 proven. 41 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-12-17 11:03:34,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:03:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-12-17 11:03:36,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:03:36,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286085625] [2021-12-17 11:03:36,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:03:36,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973825846] [2021-12-17 11:03:36,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973825846] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:03:36,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:03:36,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-12-17 11:03:36,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588474167] [2021-12-17 11:03:36,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:03:36,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 11:03:36,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:03:36,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 11:03:36,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-12-17 11:03:36,787 INFO L87 Difference]: Start difference. First operand 177 states and 225 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 12 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 11 states have call successors, (36) [2021-12-17 11:03:38,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:03:44,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:03:49,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:03:52,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:00,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:02,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:04,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:06,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:22,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:04:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:04:22,311 INFO L93 Difference]: Finished difference Result 280 states and 365 transitions. [2021-12-17 11:04:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 11:04:22,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 12 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 11 states have call successors, (36) Word has length 117 [2021-12-17 11:04:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:04:22,313 INFO L225 Difference]: With dead ends: 280 [2021-12-17 11:04:22,313 INFO L226 Difference]: Without dead ends: 278 [2021-12-17 11:04:22,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=455, Invalid=1262, Unknown=5, NotChecked=0, Total=1722 [2021-12-17 11:04:22,314 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 135 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 240 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2021-12-17 11:04:22,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 384 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 669 Invalid, 8 Unknown, 0 Unchecked, 22.8s Time] [2021-12-17 11:04:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-17 11:04:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 265. [2021-12-17 11:04:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 150 states have (on average 1.1133333333333333) internal successors, (167), 151 states have internal predecessors, (167), 89 states have call successors, (89), 25 states have call predecessors, (89), 25 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2021-12-17 11:04:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 344 transitions. [2021-12-17 11:04:22,352 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 344 transitions. Word has length 117 [2021-12-17 11:04:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:04:22,352 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 344 transitions. [2021-12-17 11:04:22,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 12 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 12 states have call predecessors, (36), 11 states have call successors, (36) [2021-12-17 11:04:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 344 transitions. [2021-12-17 11:04:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 11:04:22,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:04:22,354 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 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] [2021-12-17 11:04:22,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 11:04:22,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:04:22,559 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:04:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:04:22,559 INFO L85 PathProgramCache]: Analyzing trace with hash 898620650, now seen corresponding path program 2 times [2021-12-17 11:04:22,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:04:22,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916692508] [2021-12-17 11:04:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:04:22,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:04:22,565 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:04:22,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918603108] [2021-12-17 11:04:22,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:04:22,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:04:22,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:04:22,566 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) [2021-12-17 11:04:22,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 11:04:22,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:04:22,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:04:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 11:04:22,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:04:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 133 proven. 86 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-12-17 11:04:23,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:04:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2021-12-17 11:04:24,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:04:24,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916692508] [2021-12-17 11:04:24,523 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:04:24,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918603108] [2021-12-17 11:04:24,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918603108] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:04:24,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:04:24,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2021-12-17 11:04:24,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11332183] [2021-12-17 11:04:24,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:04:24,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 11:04:24,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:04:24,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 11:04:24,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-12-17 11:04:24,525 INFO L87 Difference]: Start difference. First operand 265 states and 344 transitions. Second operand has 23 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2021-12-17 11:04:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:04:28,095 INFO L93 Difference]: Finished difference Result 314 states and 413 transitions. [2021-12-17 11:04:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 11:04:28,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 123 [2021-12-17 11:04:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:04:28,097 INFO L225 Difference]: With dead ends: 314 [2021-12-17 11:04:28,097 INFO L226 Difference]: Without dead ends: 306 [2021-12-17 11:04:28,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 218 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 11:04:28,098 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 11:04:28,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 476 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 11:04:28,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-17 11:04:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 260. [2021-12-17 11:04:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 146 states have (on average 1.1027397260273972) internal successors, (161), 147 states have internal predecessors, (161), 87 states have call successors, (87), 26 states have call predecessors, (87), 26 states have return successors, (87), 86 states have call predecessors, (87), 87 states have call successors, (87) [2021-12-17 11:04:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 335 transitions. [2021-12-17 11:04:28,144 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 335 transitions. Word has length 123 [2021-12-17 11:04:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:04:28,144 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 335 transitions. [2021-12-17 11:04:28,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.588235294117647) internal successors, (44), 18 states have internal predecessors, (44), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2021-12-17 11:04:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 335 transitions. [2021-12-17 11:04:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-17 11:04:28,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:04:28,146 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:04:28,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-17 11:04:28,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 11:04:28,359 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:04:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:04:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2140218935, now seen corresponding path program 4 times [2021-12-17 11:04:28,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:04:28,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711814535] [2021-12-17 11:04:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:04:28,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:04:28,366 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:04:28,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144334414] [2021-12-17 11:04:28,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 11:04:28,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:04:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:04:28,368 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) [2021-12-17 11:04:28,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 11:04:28,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 11:04:28,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:04:28,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-17 11:04:28,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:04:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 246 proven. 237 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2021-12-17 11:04:31,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:05:42,782 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse13 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse8 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse4 (* 2 .cse10)) (.cse5 (* 2 .cse11)) (.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse2 (* 2 .cse12)) (.cse3 (* 2 .cse13))) (or (not (= (+ .cse0 .cse1 .cse2 .cse3 (* 2 |c_ULTIMATE.start_main_~c~0#1|)) (+ .cse4 |c_ULTIMATE.start_main_~b~0#1| .cse5))) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 2 .cse6) (* 2 .cse7) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (+ (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|) (* 2 .cse8) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (* 2 .cse9))) (not (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~c~0#1|) .cse8 .cse10 .cse11 .cse9) (+ .cse12 .cse13 |c_ULTIMATE.start_main_~c~0#1| .cse6 .cse7))) (not (= (+ .cse12 .cse13 |c_ULTIMATE.start_main_~c~0#1|) (+ .cse10 .cse11))) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (<= (+ .cse4 |c_ULTIMATE.start_main_~c~0#1| .cse5) (+ .cse0 .cse1 .cse2 .cse3))))) is different from true [2021-12-17 11:06:20,621 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse13 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse8 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse4 (* 2 .cse10)) (.cse5 (* 2 .cse11)) (.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse2 (* 2 .cse12)) (.cse3 (* 2 .cse13)) (.cse14 (+ .cse10 .cse11))) (or (not (= (+ .cse0 .cse1 .cse2 .cse3 (* 2 |c_ULTIMATE.start_main_~c~0#1|)) (+ .cse4 |c_ULTIMATE.start_main_~b~0#1| .cse5))) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 2 .cse6) (* 2 .cse7) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (+ (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|) (* 2 .cse8) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (* 2 .cse9))) (not (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~c~0#1|) .cse8 .cse10 .cse11 .cse9) (+ .cse12 .cse13 |c_ULTIMATE.start_main_~c~0#1| .cse6 .cse7))) (not (= (+ .cse12 .cse13 |c_ULTIMATE.start_main_~c~0#1|) .cse14)) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) (<= (+ .cse4 |c_ULTIMATE.start_main_~c~0#1| .cse5) (+ .cse0 .cse1 .cse2 .cse3)) (not (= |c_ULTIMATE.start_main_~a~0#1| .cse14))))) is different from true [2021-12-17 11:07:03,642 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse17 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse16 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse15 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (let ((.cse8 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* 3 .cse12)) (.cse3 (* 3 .cse13)) (.cse4 (* 2 .cse14)) (.cse5 (* 2 .cse15)) (.cse0 (* 2 .cse16)) (.cse1 (* 2 .cse17))) (or (<= (+ .cse0 |c_ULTIMATE.start_main_~c~0#1| .cse1) (+ .cse2 .cse3 .cse4 .cse5 |c_ULTIMATE.start_main_~b~0#1|)) (= (+ (* 3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (* 3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (* 2 .cse6) (* 2 .cse7) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (+ (* 3 .cse8) (* 2 .cse9) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (* 3 .cse10) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (* 2 .cse11))) (not (= (+ .cse12 .cse13 .cse14 .cse15 |c_ULTIMATE.start_main_~c~0#1|) (+ .cse16 |c_ULTIMATE.start_main_~b~0#1| .cse17))) (<= (* 2 |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~c~0#1|) (not (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~c~0#1|) .cse8 .cse9 .cse17 .cse11 .cse16 .cse10 |c_ULTIMATE.start_main_~b~0#1|) (+ .cse15 .cse14 |c_ULTIMATE.start_main_~c~0#1| .cse7 .cse12 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|) .cse13 .cse6))) (not (= (+ .cse2 .cse3 .cse4 .cse5 (* 2 |c_ULTIMATE.start_main_~c~0#1|)) (+ .cse0 (* 3 |c_ULTIMATE.start_main_~b~0#1|) .cse1))) (not (= |c_ULTIMATE.start_main_~a~0#1| (+ .cse16 .cse17)))))) is different from true [2021-12-17 11:07:33,863 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse17 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse16 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse15 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (let ((.cse9 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* 3 .cse12)) (.cse3 (* 3 .cse13)) (.cse4 (* 2 .cse14)) (.cse5 (* 2 .cse15)) (.cse0 (* 2 .cse16)) (.cse1 (* 2 .cse17)) (.cse18 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (or (<= (+ .cse0 |c_ULTIMATE.start_main_~c~0#1| .cse1) (+ .cse2 .cse3 .cse4 .cse5 |c_ULTIMATE.start_main_~b~0#1|)) (= (+ (* 3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (* 3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (* 2 .cse6) (* 2 .cse7) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (+ (* 3 .cse8) (* 2 .cse9) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (* 3 .cse10) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (* 2 .cse11))) (not (= (+ .cse12 .cse13 .cse14 .cse15 |c_ULTIMATE.start_main_~c~0#1|) (+ .cse16 |c_ULTIMATE.start_main_~b~0#1| .cse17))) (<= (* 2 |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~c~0#1|) (not (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~c~0#1|) .cse8 .cse9 .cse17 .cse11 .cse16 .cse10 |c_ULTIMATE.start_main_~b~0#1|) (+ .cse15 .cse14 |c_ULTIMATE.start_main_~c~0#1| .cse7 .cse12 .cse18 .cse13 .cse6))) (not (= (+ .cse2 .cse3 .cse4 .cse5 (* 2 |c_ULTIMATE.start_main_~c~0#1|)) (+ .cse0 (* 3 |c_ULTIMATE.start_main_~b~0#1|) .cse1))) (not (= (+ .cse12 .cse18 .cse13) (+ .cse8 .cse10 |c_ULTIMATE.start_main_~b~0#1|))) (not (= |c_ULTIMATE.start_main_~a~0#1| (+ .cse16 .cse17)))))) is different from true [2021-12-17 11:07:53,904 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_222| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_216| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_169| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_145| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_144| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_175| Int)) (let ((.cse4 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_175|)) (.cse5 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_169|)) (.cse0 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_216| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235|)) (.cse1 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_216| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133|)) (.cse2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_222| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133|)) (.cse3 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_222|)) (.cse12 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_222| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_144|)) (.cse13 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_169|)) (.cse14 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_216| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_145|)) (.cse15 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_175|)) (.cse16 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_216| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_145| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133|)) (.cse17 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_222| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_144|)) (.cse6 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_222|)) (.cse7 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_216| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133|)) (.cse8 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_216| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_235|)) (.cse9 (* |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_169| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_145|)) (.cse10 (* |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_144| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_175|)) (.cse11 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_222| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_133|))) (or (<= (+ (* 2 .cse0) .cse1 .cse2 (* 2 .cse3)) (+ .cse4 .cse5)) (<= (+ (* 3 .cse4) (* 3 .cse5)) (+ (* 4 .cse0) (* 3 .cse1) (* 3 .cse2) (* 4 .cse3))) (= (+ (* 3 .cse6) (* 2 .cse7) (* 3 .cse8) (* 2 .cse9) (* 2 .cse10) (* 2 .cse11)) (+ (* 2 .cse12) (* 2 .cse13) (* 3 .cse14) (* 2 .cse15) (* 2 .cse16) (* 3 .cse17))) (not (= (+ .cse12 .cse13 .cse14 .cse15 .cse16 .cse17) (+ .cse6 .cse7 .cse8 .cse9 .cse10 .cse11)))))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2021-12-17 11:08:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 245 proven. 116 refuted. 15 times theorem prover too weak. 762 trivial. 36 not checked. [2021-12-17 11:08:27,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:08:27,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711814535] [2021-12-17 11:08:27,121 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:08:27,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144334414] [2021-12-17 11:08:27,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144334414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:08:27,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:08:27,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-12-17 11:08:27,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481290593] [2021-12-17 11:08:27,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:08:27,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 11:08:27,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:08:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 11:08:27,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=779, Unknown=12, NotChecked=320, Total=1332 [2021-12-17 11:08:27,123 INFO L87 Difference]: Start difference. First operand 260 states and 335 transitions. Second operand has 37 states, 32 states have (on average 1.875) internal successors, (60), 27 states have internal predecessors, (60), 20 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (54), 22 states have call predecessors, (54), 19 states have call successors, (54) [2021-12-17 11:08:29,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:32,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:35,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:38,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:40,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:08:44,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:03,356 WARN L227 SmtUtils]: Spent 15.00s on a formula simplification. DAG size of input: 77 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:09:15,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:22,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:30,072 WARN L227 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 105 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:09:38,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:40,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:10:08,587 WARN L227 SmtUtils]: Spent 13.45s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:10:10,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:10:52,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 42.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:01,231 WARN L227 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 101 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:11:03,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:05,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:07,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:09,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:11,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:20,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:23,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:29,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:32,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:34,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:11:43,782 WARN L227 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 109 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:12:51,854 WARN L227 SmtUtils]: Spent 56.17s on a formula simplification. DAG size of input: 102 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:12:55,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:12:57,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:14:10,940 WARN L227 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 128 DAG size of output: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:14:12,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:14:18,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:14:20,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:15:37,746 WARN L227 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 126 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:16:01,148 WARN L227 SmtUtils]: Spent 21.23s on a formula simplification. DAG size of input: 75 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:16:03,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:17:07,041 WARN L227 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 93 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:17:08,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:17:11,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] Killed by 15