./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard2.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 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:19:31,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:19:31,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:19:31,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:19:31,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:19:31,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:19:31,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:19:31,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:19:31,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:19:31,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:19:31,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:19:31,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:19:31,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:19:31,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:19:31,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:19:31,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:19:31,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:19:31,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:19:31,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:19:31,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:19:31,167 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:19:31,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:19:31,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:19:31,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:19:31,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:19:31,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:19:31,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:19:31,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:19:31,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:19:31,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:19:31,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:19:31,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:19:31,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:19:31,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:19:31,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:19:31,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:19:31,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:19:31,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:19:31,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:19:31,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:19:31,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:19:31,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:19:31,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:19:31,209 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:19:31,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:19:31,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:19:31,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:19:31,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:19:31,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:19:31,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:19:31,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:19:31,213 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:19:31,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:19:31,214 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:19:31,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:19:31,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:19:31,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:19:31,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:19:31,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:19:31,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:19:31,215 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:19:31,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:19:31,216 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:19:31,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:19:31,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:19:31,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:19:31,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:19:31,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:19:31,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:19:31,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:19:31,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:19:31,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:19:31,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:19:31,221 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:19:31,221 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:19:31,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:19:31,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 [2022-07-12 04:19:31,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:19:31,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:19:31,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:19:31,484 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:19:31,484 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:19:31,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard2.c [2022-07-12 04:19:31,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38fe14a6e/b98e21e2c63e45ffbba9cc79dfa90e21/FLAG38e5c3dab [2022-07-12 04:19:31,942 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:19:31,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard2.c [2022-07-12 04:19:31,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38fe14a6e/b98e21e2c63e45ffbba9cc79dfa90e21/FLAG38e5c3dab [2022-07-12 04:19:31,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38fe14a6e/b98e21e2c63e45ffbba9cc79dfa90e21 [2022-07-12 04:19:31,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:19:31,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:19:31,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:19:31,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:19:31,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:19:31,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:19:31" (1/1) ... [2022-07-12 04:19:31,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b295434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:31, skipping insertion in model container [2022-07-12 04:19:31,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:19:31" (1/1) ... [2022-07-12 04:19:31,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:19:32,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:19:32,168 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/hard2.c[526,539] [2022-07-12 04:19:32,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:19:32,197 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:19:32,210 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/hard2.c[526,539] [2022-07-12 04:19:32,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:19:32,241 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:19:32,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32 WrapperNode [2022-07-12 04:19:32,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:19:32,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:19:32,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:19:32,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:19:32,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,281 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-07-12 04:19:32,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:19:32,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:19:32,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:19:32,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:19:32,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:19:32,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:19:32,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:19:32,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:19:32,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (1/1) ... [2022-07-12 04:19:32,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:19:32,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:32,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 04:19:32,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 04:19:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:19:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:19:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:19:32,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:19:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 04:19:32,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 04:19:32,451 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:19:32,453 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:19:32,595 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:19:32,600 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:19:32,600 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 04:19:32,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:19:32 BoogieIcfgContainer [2022-07-12 04:19:32,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:19:32,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:19:32,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:19:32,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:19:32,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:19:31" (1/3) ... [2022-07-12 04:19:32,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5302abb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:19:32, skipping insertion in model container [2022-07-12 04:19:32,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:19:32" (2/3) ... [2022-07-12 04:19:32,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5302abb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:19:32, skipping insertion in model container [2022-07-12 04:19:32,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:19:32" (3/3) ... [2022-07-12 04:19:32,608 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2.c [2022-07-12 04:19:32,634 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:19:32,635 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:19:32,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:19:32,712 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@634aae45, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@508fe76 [2022-07-12 04:19:32,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:19:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 04:19:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 04:19:32,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:32,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:32,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:32,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1812186719, now seen corresponding path program 1 times [2022-07-12 04:19:32,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:32,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366950086] [2022-07-12 04:19:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:32,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:19:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:32,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366950086] [2022-07-12 04:19:32,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366950086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:19:32,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:19:32,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:19:32,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898092605] [2022-07-12 04:19:32,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:19:32,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:19:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:33,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:19:33,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:19:33,029 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:19:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:33,099 INFO L93 Difference]: Finished difference Result 61 states and 105 transitions. [2022-07-12 04:19:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:19:33,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-12 04:19:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:33,108 INFO L225 Difference]: With dead ends: 61 [2022-07-12 04:19:33,109 INFO L226 Difference]: Without dead ends: 31 [2022-07-12 04:19:33,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:19:33,115 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:33,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 104 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:19:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-12 04:19:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-07-12 04:19:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 04:19:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-07-12 04:19:33,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 7 [2022-07-12 04:19:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:33,150 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-07-12 04:19:33,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:19:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-07-12 04:19:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 04:19:33,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:33,151 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:33,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:19:33,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:33,153 INFO L85 PathProgramCache]: Analyzing trace with hash 876512919, now seen corresponding path program 1 times [2022-07-12 04:19:33,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:33,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187448464] [2022-07-12 04:19:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:33,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:33,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 04:19:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:19:33,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:33,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187448464] [2022-07-12 04:19:33,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187448464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:19:33,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:19:33,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:19:33,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209397081] [2022-07-12 04:19:33,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:19:33,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:19:33,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:19:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:19:33,230 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:19:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:33,288 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-07-12 04:19:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:19:33,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-12 04:19:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:33,291 INFO L225 Difference]: With dead ends: 37 [2022-07-12 04:19:33,291 INFO L226 Difference]: Without dead ends: 35 [2022-07-12 04:19:33,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:19:33,297 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:33,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:19:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-12 04:19:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-07-12 04:19:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 04:19:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-12 04:19:33,307 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 12 [2022-07-12 04:19:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:33,308 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-12 04:19:33,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 04:19:33,311 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-12 04:19:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 04:19:33,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:33,312 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:33,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 04:19:33,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:33,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2107096801, now seen corresponding path program 1 times [2022-07-12 04:19:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:33,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005225377] [2022-07-12 04:19:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:33,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:33,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:33,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510490301] [2022-07-12 04:19:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:33,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:33,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:33,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:33,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:19:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:19:33,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:19:33,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:19:33,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:33,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005225377] [2022-07-12 04:19:33,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:33,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510490301] [2022-07-12 04:19:33,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510490301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:19:33,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:19:33,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:19:33,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992175234] [2022-07-12 04:19:33,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:19:33,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:19:33,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:19:33,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:19:33,515 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:19:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:33,590 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-07-12 04:19:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:19:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-12 04:19:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:33,592 INFO L225 Difference]: With dead ends: 56 [2022-07-12 04:19:33,593 INFO L226 Difference]: Without dead ends: 42 [2022-07-12 04:19:33,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:19:33,595 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:33,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 89 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:19:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-12 04:19:33,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-12 04:19:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-12 04:19:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-07-12 04:19:33,609 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 17 [2022-07-12 04:19:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:33,610 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-07-12 04:19:33,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 04:19:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-07-12 04:19:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 04:19:33,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:33,611 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:33,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:19:33,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:33,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2032872060, now seen corresponding path program 1 times [2022-07-12 04:19:33,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:33,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490624113] [2022-07-12 04:19:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:33,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:33,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:33,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274034045] [2022-07-12 04:19:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:33,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:33,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:33,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:33,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:19:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:19:33,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 04:19:33,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:19:33,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490624113] [2022-07-12 04:19:33,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274034045] [2022-07-12 04:19:33,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274034045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:19:33,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:19:33,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:19:33,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370642868] [2022-07-12 04:19:33,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:19:33,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:19:33,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:33,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:19:33,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:19:33,972 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 04:19:34,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:34,022 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-07-12 04:19:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:19:34,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-07-12 04:19:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:34,024 INFO L225 Difference]: With dead ends: 55 [2022-07-12 04:19:34,024 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 04:19:34,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:19:34,027 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:34,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 65 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:19:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 04:19:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-12 04:19:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-12 04:19:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-07-12 04:19:34,049 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 24 [2022-07-12 04:19:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:34,049 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-07-12 04:19:34,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 04:19:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-07-12 04:19:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 04:19:34,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:34,050 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:34,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:19:34,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 04:19:34,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:34,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1003977419, now seen corresponding path program 1 times [2022-07-12 04:19:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:34,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553987469] [2022-07-12 04:19:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:34,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:34,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:34,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512241581] [2022-07-12 04:19:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:34,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:34,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:34,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:19:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:34,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 04:19:34,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 04:19:34,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:19:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 04:19:34,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:34,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553987469] [2022-07-12 04:19:34,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:34,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512241581] [2022-07-12 04:19:34,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512241581] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 04:19:34,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:19:34,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-12 04:19:34,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469138820] [2022-07-12 04:19:34,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:19:34,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:19:34,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:34,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:19:34,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:19:34,485 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 04:19:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:35,322 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-07-12 04:19:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:19:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-07-12 04:19:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:35,324 INFO L225 Difference]: With dead ends: 59 [2022-07-12 04:19:35,325 INFO L226 Difference]: Without dead ends: 57 [2022-07-12 04:19:35,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:19:35,326 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:35,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 73 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 04:19:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-12 04:19:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-07-12 04:19:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-12 04:19:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-07-12 04:19:35,335 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 34 [2022-07-12 04:19:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:35,335 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-12 04:19:35,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 04:19:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-07-12 04:19:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 04:19:35,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:35,337 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:35,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:19:35,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:35,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:35,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1409666923, now seen corresponding path program 1 times [2022-07-12 04:19:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:35,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216827076] [2022-07-12 04:19:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:35,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:35,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877413095] [2022-07-12 04:19:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:35,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:35,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:35,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:35,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:19:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:35,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 04:19:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-12 04:19:35,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:19:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-12 04:19:36,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:36,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216827076] [2022-07-12 04:19:36,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:36,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877413095] [2022-07-12 04:19:36,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877413095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:19:36,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:19:36,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-12 04:19:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627903414] [2022-07-12 04:19:36,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:19:36,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 04:19:36,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 04:19:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:19:36,669 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:19:42,147 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 54 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:19:44,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-12 04:19:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:44,793 INFO L93 Difference]: Finished difference Result 144 states and 200 transitions. [2022-07-12 04:19:44,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 04:19:44,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 54 [2022-07-12 04:19:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:44,796 INFO L225 Difference]: With dead ends: 144 [2022-07-12 04:19:44,796 INFO L226 Difference]: Without dead ends: 115 [2022-07-12 04:19:44,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:19:44,797 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:44,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 114 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-07-12 04:19:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-12 04:19:44,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-07-12 04:19:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 66 states have internal predecessors, (77), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-12 04:19:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2022-07-12 04:19:44,816 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 54 [2022-07-12 04:19:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:44,818 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2022-07-12 04:19:44,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-12 04:19:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2022-07-12 04:19:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 04:19:44,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:44,822 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:44,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:19:45,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:45,031 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:45,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:45,032 INFO L85 PathProgramCache]: Analyzing trace with hash 135028242, now seen corresponding path program 1 times [2022-07-12 04:19:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:45,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463078378] [2022-07-12 04:19:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:45,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:45,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:45,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297605772] [2022-07-12 04:19:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:45,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:45,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:45,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:45,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:19:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:45,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 04:19:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-12 04:19:45,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:19:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-12 04:19:45,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:45,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463078378] [2022-07-12 04:19:45,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:45,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297605772] [2022-07-12 04:19:45,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297605772] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:19:45,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:19:45,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-07-12 04:19:45,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081240229] [2022-07-12 04:19:45,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:19:45,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 04:19:45,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:45,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 04:19:45,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:19:45,529 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 16 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-12 04:19:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:45,974 INFO L93 Difference]: Finished difference Result 159 states and 209 transitions. [2022-07-12 04:19:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 04:19:45,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 65 [2022-07-12 04:19:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:45,977 INFO L225 Difference]: With dead ends: 159 [2022-07-12 04:19:45,977 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 04:19:45,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:19:45,981 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:45,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 94 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:19:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 04:19:46,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2022-07-12 04:19:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 59 states have internal predecessors, (66), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 04:19:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-07-12 04:19:46,010 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 65 [2022-07-12 04:19:46,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:46,011 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-07-12 04:19:46,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-12 04:19:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-07-12 04:19:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 04:19:46,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:46,014 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:19:46,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 04:19:46,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:46,228 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:46,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1189112541, now seen corresponding path program 1 times [2022-07-12 04:19:46,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:46,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355142420] [2022-07-12 04:19:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:46,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:46,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:46,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28779436] [2022-07-12 04:19:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:46,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:46,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:46,245 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:46,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:19:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:19:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 04:19:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-12 04:19:46,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:19:46,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:19:46,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355142420] [2022-07-12 04:19:46,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:19:46,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28779436] [2022-07-12 04:19:46,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28779436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:19:46,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:19:46,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 04:19:46,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104057368] [2022-07-12 04:19:46,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:19:46,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 04:19:46,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:19:46,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 04:19:46,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:19:46,403 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-12 04:19:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:19:46,446 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2022-07-12 04:19:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 04:19:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-07-12 04:19:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:19:46,447 INFO L225 Difference]: With dead ends: 105 [2022-07-12 04:19:46,447 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 04:19:46,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-12 04:19:46,448 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:19:46,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 78 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:19:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 04:19:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-12 04:19:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-12 04:19:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-07-12 04:19:46,455 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 74 [2022-07-12 04:19:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:19:46,456 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-07-12 04:19:46,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-12 04:19:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-07-12 04:19:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-12 04:19:46,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:19:46,457 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-12 04:19:46,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:19:46,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:46,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:19:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:19:46,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2022890084, now seen corresponding path program 2 times [2022-07-12 04:19:46,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:19:46,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575105533] [2022-07-12 04:19:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:19:46,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:19:46,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:19:46,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643616637] [2022-07-12 04:19:46,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:19:46,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:19:46,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:19:46,682 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:19:46,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:19:46,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:19:46,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:19:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 04:19:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:19:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-12 04:19:47,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:20:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-12 04:20:06,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:20:06,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575105533] [2022-07-12 04:20:06,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:20:06,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643616637] [2022-07-12 04:20:06,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643616637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:20:06,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:20:06,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-07-12 04:20:06,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584073588] [2022-07-12 04:20:06,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:20:06,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 04:20:06,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:20:06,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 04:20:06,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=278, Unknown=2, NotChecked=0, Total=380 [2022-07-12 04:20:06,238 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 04:20:36,018 WARN L233 SmtUtils]: Spent 26.36s on a formula simplification. DAG size of input: 229 DAG size of output: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:21:07,662 WARN L233 SmtUtils]: Spent 14.24s on a formula simplification. DAG size of input: 107 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:21:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:14,035 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2022-07-12 04:21:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 04:21:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 84 [2022-07-12 04:21:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:14,037 INFO L225 Difference]: With dead ends: 241 [2022-07-12 04:21:14,037 INFO L226 Difference]: Without dead ends: 190 [2022-07-12 04:21:14,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 69.7s TimeCoverageRelationStatistics Valid=244, Invalid=621, Unknown=5, NotChecked=0, Total=870 [2022-07-12 04:21:14,039 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 117 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:14,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 289 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-12 04:21:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-12 04:21:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2022-07-12 04:21:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 97 states have (on average 1.2061855670103092) internal successors, (117), 98 states have internal predecessors, (117), 40 states have call successors, (40), 16 states have call predecessors, (40), 16 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-07-12 04:21:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 196 transitions. [2022-07-12 04:21:14,077 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 196 transitions. Word has length 84 [2022-07-12 04:21:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:14,077 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 196 transitions. [2022-07-12 04:21:14,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 04:21:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 196 transitions. [2022-07-12 04:21:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-12 04:21:14,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:14,079 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-12 04:21:14,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:14,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:14,298 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash -757369614, now seen corresponding path program 3 times [2022-07-12 04:21:14,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:14,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028451694] [2022-07-12 04:21:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:14,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:14,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:21:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559704785] [2022-07-12 04:21:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:21:14,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:14,308 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:14,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:21:14,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:21:14,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:21:14,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-12 04:21:14,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:18,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:18,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028451694] [2022-07-12 04:21:18,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:21:18,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559704785] [2022-07-12 04:21:18,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559704785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:21:18,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-12 04:21:18,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-12 04:21:18,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279860525] [2022-07-12 04:21:18,947 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:18,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:21:18,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:21:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:21:18,948 INFO L87 Difference]: Start difference. First operand 154 states and 196 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 04:21:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:19,126 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2022-07-12 04:21:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:21:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2022-07-12 04:21:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:19,127 INFO L225 Difference]: With dead ends: 164 [2022-07-12 04:21:19,127 INFO L226 Difference]: Without dead ends: 162 [2022-07-12 04:21:19,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:21:19,128 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:19,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 52 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:21:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-12 04:21:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-07-12 04:21:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 104 states have internal predecessors, (123), 40 states have call successors, (40), 18 states have call predecessors, (40), 18 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-07-12 04:21:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2022-07-12 04:21:19,149 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 89 [2022-07-12 04:21:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:19,149 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2022-07-12 04:21:19,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 04:21:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2022-07-12 04:21:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-12 04:21:19,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:19,151 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:19,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:19,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 04:21:19,383 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:19,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:19,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1030960765, now seen corresponding path program 1 times [2022-07-12 04:21:19,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:19,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408032362] [2022-07-12 04:21:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:19,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:19,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:21:19,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302907863] [2022-07-12 04:21:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:19,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:19,396 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:19,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:21:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:21:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-12 04:21:19,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-12 04:21:20,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:20,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408032362] [2022-07-12 04:21:20,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:21:20,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302907863] [2022-07-12 04:21:20,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302907863] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:20,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:21:20,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-12 04:21:20,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733867079] [2022-07-12 04:21:20,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:20,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 04:21:20,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:20,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 04:21:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-12 04:21:20,133 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-07-12 04:21:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:20,541 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2022-07-12 04:21:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:21:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 100 [2022-07-12 04:21:20,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:20,543 INFO L225 Difference]: With dead ends: 174 [2022-07-12 04:21:20,543 INFO L226 Difference]: Without dead ends: 166 [2022-07-12 04:21:20,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 186 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:21:20,543 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 6 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:20,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 274 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:21:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-12 04:21:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-07-12 04:21:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 105 states have (on average 1.180952380952381) internal successors, (124), 106 states have internal predecessors, (124), 42 states have call successors, (42), 18 states have call predecessors, (42), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-07-12 04:21:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2022-07-12 04:21:20,563 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 100 [2022-07-12 04:21:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:20,563 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2022-07-12 04:21:20,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 6 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-07-12 04:21:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2022-07-12 04:21:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-12 04:21:20,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:20,565 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:20,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:20,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:20,784 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash 581208592, now seen corresponding path program 1 times [2022-07-12 04:21:20,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:20,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77600204] [2022-07-12 04:21:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:20,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:20,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:21:20,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161288146] [2022-07-12 04:21:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:20,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:20,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:20,812 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:20,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:21:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:21:20,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 04:21:20,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2022-07-12 04:21:20,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 04:21:20,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:20,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77600204] [2022-07-12 04:21:20,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:21:20,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161288146] [2022-07-12 04:21:20,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161288146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:21:20,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:21:20,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 04:21:20,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013498482] [2022-07-12 04:21:20,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:21:20,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 04:21:20,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:20,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 04:21:20,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 04:21:20,995 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:21:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:21,171 INFO L93 Difference]: Finished difference Result 221 states and 281 transitions. [2022-07-12 04:21:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:21:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 101 [2022-07-12 04:21:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:21,172 INFO L225 Difference]: With dead ends: 221 [2022-07-12 04:21:21,172 INFO L226 Difference]: Without dead ends: 183 [2022-07-12 04:21:21,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:21:21,173 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 18 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:21,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 111 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:21:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-12 04:21:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 157. [2022-07-12 04:21:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 100 states have (on average 1.16) internal successors, (116), 101 states have internal predecessors, (116), 38 states have call successors, (38), 18 states have call predecessors, (38), 18 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-12 04:21:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2022-07-12 04:21:21,210 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 101 [2022-07-12 04:21:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:21,210 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2022-07-12 04:21:21,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-12 04:21:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2022-07-12 04:21:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-12 04:21:21,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:21,211 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 04:21:21,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:21,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 04:21:21,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash -458727034, now seen corresponding path program 2 times [2022-07-12 04:21:21,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:21,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699649527] [2022-07-12 04:21:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:21,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:21,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:21:21,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037476251] [2022-07-12 04:21:21,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:21:21,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:21,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:21,441 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:21,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:21:21,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:21:21,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:21,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:21:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:21:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-07-12 04:21:21,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:21:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-12 04:21:21,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:21:21,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699649527] [2022-07-12 04:21:21,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 04:21:21,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037476251] [2022-07-12 04:21:21,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037476251] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:21:21,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 04:21:21,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2022-07-12 04:21:21,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014411831] [2022-07-12 04:21:21,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 04:21:21,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:21:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:21:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:21:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:21:21,991 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 7 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-07-12 04:21:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:21:22,153 INFO L93 Difference]: Finished difference Result 233 states and 301 transitions. [2022-07-12 04:21:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:21:22,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 7 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) Word has length 110 [2022-07-12 04:21:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:21:22,155 INFO L225 Difference]: With dead ends: 233 [2022-07-12 04:21:22,155 INFO L226 Difference]: Without dead ends: 156 [2022-07-12 04:21:22,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:21:22,156 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 4 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:21:22,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 210 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:21:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-12 04:21:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-07-12 04:21:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-12 04:21:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 187 transitions. [2022-07-12 04:21:22,180 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 187 transitions. Word has length 110 [2022-07-12 04:21:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:21:22,180 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 187 transitions. [2022-07-12 04:21:22,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 7 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-07-12 04:21:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 187 transitions. [2022-07-12 04:21:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-12 04:21:22,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:21:22,181 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-07-12 04:21:22,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:21:22,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 04:21:22,395 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:21:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:21:22,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1864958347, now seen corresponding path program 4 times [2022-07-12 04:21:22,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:21:22,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923749545] [2022-07-12 04:21:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:21:22,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:21:22,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 04:21:22,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654512679] [2022-07-12 04:21:22,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:21:22,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:21:22,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:21:22,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:21:22,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:21:22,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:21:22,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:21:22,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-12 04:21:22,490 INFO L286 TraceCheckSpWp]: Computing forward predicates...