./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.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 052aa366c05075bf32d0b6fa176a2f7194f524315c85e0eaee7e4a343f477db5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:19:11,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:19:11,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:19:11,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:19:11,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:19:11,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:19:11,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:19:11,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:19:11,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:19:11,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:19:11,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:19:11,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:19:11,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:19:11,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:19:11,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:19:11,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:19:11,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:19:11,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:19:11,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:19:11,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:19:11,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:19:11,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:19:11,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:19:11,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:19:11,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:19:11,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:19:11,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:19:11,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:19:11,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:19:11,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:19:11,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:19:11,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:19:11,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:19:11,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:19:11,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:19:11,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:19:11,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:19:11,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:19:11,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:19:11,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:19:11,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:19:11,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:19:11,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:19:11,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:19:11,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:19:11,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:19:11,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:19:11,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:19:11,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:19:11,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:19:11,234 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:19:11,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:19:11,235 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:19:11,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:19:11,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:19:11,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:19:11,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:19:11,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:19:11,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:19:11,236 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:19:11,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:19:11,237 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:19:11,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:19:11,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:19:11,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:19:11,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:19:11,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:19:11,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:19:11,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:19:11,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:19:11,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:19:11,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:19:11,239 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:19:11,239 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:19:11,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:19:11,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:19:11,239 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052aa366c05075bf32d0b6fa176a2f7194f524315c85e0eaee7e4a343f477db5 [2021-12-16 00:19:11,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:19:11,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:19:11,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:19:11,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:19:11,460 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:19:11,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.c [2021-12-16 00:19:11,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63b9cbb3/95d1981400024a4189fa605653a3cba8/FLAG3dc279c9f [2021-12-16 00:19:11,877 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:19:11,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.c [2021-12-16 00:19:11,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63b9cbb3/95d1981400024a4189fa605653a3cba8/FLAG3dc279c9f [2021-12-16 00:19:12,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63b9cbb3/95d1981400024a4189fa605653a3cba8 [2021-12-16 00:19:12,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:19:12,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:19:12,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:19:12,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:19:12,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:19:12,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51f397a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12, skipping insertion in model container [2021-12-16 00:19:12,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:19:12,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:19:12,474 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.c[489,502] [2021-12-16 00:19:12,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:19:12,490 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:19:12,498 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound100.c[489,502] [2021-12-16 00:19:12,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:19:12,513 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:19:12,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12 WrapperNode [2021-12-16 00:19:12,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:19:12,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:19:12,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:19:12,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:19:12,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,549 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2021-12-16 00:19:12,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:19:12,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:19:12,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:19:12,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:19:12,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:19:12,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:19:12,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:19:12,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:19:12,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (1/1) ... [2021-12-16 00:19:12,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:19:12,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:19:12,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 00:19:12,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 00:19:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:19:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 00:19:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 00:19:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:19:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:19:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:19:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-16 00:19:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-16 00:19:12,699 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:19:12,700 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:19:12,846 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:19:12,851 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:19:12,851 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 00:19:12,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:19:12 BoogieIcfgContainer [2021-12-16 00:19:12,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:19:12,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:19:12,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:19:12,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:19:12,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:19:12" (1/3) ... [2021-12-16 00:19:12,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53896a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:19:12, skipping insertion in model container [2021-12-16 00:19:12,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:19:12" (2/3) ... [2021-12-16 00:19:12,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53896a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:19:12, skipping insertion in model container [2021-12-16 00:19:12,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:19:12" (3/3) ... [2021-12-16 00:19:12,858 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound100.c [2021-12-16 00:19:12,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:19:12,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:19:12,910 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:19:12,915 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 00:19:12,915 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:19:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 00:19:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 00:19:12,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:19:12,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:12,932 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:19:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:19:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash 516392259, now seen corresponding path program 1 times [2021-12-16 00:19:12,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:19:12,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344696235] [2021-12-16 00:19:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:12,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:19:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:13,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 00:19:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:13,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:19:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 00:19:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:13,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:19:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 00:19:13,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:19:13,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344696235] [2021-12-16 00:19:13,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344696235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:19:13,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:19:13,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 00:19:13,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47494470] [2021-12-16 00:19:13,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:19:13,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:19:13,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:19:13,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:19:13,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:19:13,176 INFO L87 Difference]: Start difference. First operand has 32 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 00:19:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:19:13,202 INFO L93 Difference]: Finished difference Result 61 states and 99 transitions. [2021-12-16 00:19:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:19:13,204 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-12-16 00:19:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:19:13,223 INFO L225 Difference]: With dead ends: 61 [2021-12-16 00:19:13,223 INFO L226 Difference]: Without dead ends: 28 [2021-12-16 00:19:13,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:19:13,234 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:19:13,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:19:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-16 00:19:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-16 00:19:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-16 00:19:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2021-12-16 00:19:13,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 29 [2021-12-16 00:19:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:19:13,275 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2021-12-16 00:19:13,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 00:19:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2021-12-16 00:19:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 00:19:13,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:19:13,278 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:13,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 00:19:13,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:19:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:19:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash 501437177, now seen corresponding path program 1 times [2021-12-16 00:19:13,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:19:13,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169543552] [2021-12-16 00:19:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:13,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:19:13,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:19:13,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585858779] [2021-12-16 00:19:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:13,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:19:13,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:19:13,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:19:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:13,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:19:13,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:19:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 00:19:13,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:19:13,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:19:13,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169543552] [2021-12-16 00:19:13,462 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:19:13,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585858779] [2021-12-16 00:19:13,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585858779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:19:13,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:19:13,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:19:13,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400969924] [2021-12-16 00:19:13,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:19:13,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:19:13,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:19:13,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:19:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:19:13,465 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 00:19:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:19:13,507 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2021-12-16 00:19:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:19:13,507 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-12-16 00:19:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:19:13,508 INFO L225 Difference]: With dead ends: 44 [2021-12-16 00:19:13,508 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 00:19:13,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:19:13,510 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:19:13,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:19:13,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 00:19:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-16 00:19:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 00:19:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2021-12-16 00:19:13,519 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 29 [2021-12-16 00:19:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:19:13,520 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2021-12-16 00:19:13,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 00:19:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2021-12-16 00:19:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 00:19:13,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:19:13,521 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:13,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 00:19:13,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:13,736 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:19:13,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:19:13,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1017640517, now seen corresponding path program 1 times [2021-12-16 00:19:13,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:19:13,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224636073] [2021-12-16 00:19:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:13,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:19:13,748 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:19:13,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706878500] [2021-12-16 00:19:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:13,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:13,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:19:13,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:19:13,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:19:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:13,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 00:19:13,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:19:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:19:14,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:19:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-16 00:19:14,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:19:14,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224636073] [2021-12-16 00:19:14,122 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:19:14,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706878500] [2021-12-16 00:19:14,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706878500] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 00:19:14,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:19:14,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-16 00:19:14,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663036823] [2021-12-16 00:19:14,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:19:14,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:19:14,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:19:14,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:19:14,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:19:14,125 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 00:19:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:19:14,173 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2021-12-16 00:19:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:19:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-12-16 00:19:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:19:14,174 INFO L225 Difference]: With dead ends: 48 [2021-12-16 00:19:14,174 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 00:19:14,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:19:14,176 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:19:14,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 139 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:19:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 00:19:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-16 00:19:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-16 00:19:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2021-12-16 00:19:14,183 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 34 [2021-12-16 00:19:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:19:14,184 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2021-12-16 00:19:14,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 00:19:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2021-12-16 00:19:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 00:19:14,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:19:14,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:14,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:19:14,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-16 00:19:14,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:19:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:19:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1133401081, now seen corresponding path program 1 times [2021-12-16 00:19:14,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:19:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419669915] [2021-12-16 00:19:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:14,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:19:14,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:19:14,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449876286] [2021-12-16 00:19:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:14,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:14,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:19:14,433 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:19:14,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:19:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:14,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 00:19:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:19:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 00:19:14,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:19:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 00:19:14,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:19:14,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419669915] [2021-12-16 00:19:14,757 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:19:14,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449876286] [2021-12-16 00:19:14,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449876286] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 00:19:14,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:19:14,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-16 00:19:14,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439576047] [2021-12-16 00:19:14,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:19:14,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:19:14,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:19:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:19:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:19:14,760 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 00:19:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:19:14,816 INFO L93 Difference]: Finished difference Result 70 states and 101 transitions. [2021-12-16 00:19:14,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:19:14,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-16 00:19:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:19:14,821 INFO L225 Difference]: With dead ends: 70 [2021-12-16 00:19:14,821 INFO L226 Difference]: Without dead ends: 66 [2021-12-16 00:19:14,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:19:14,824 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 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 [2021-12-16 00:19:14,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:19:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-16 00:19:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-16 00:19:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 28 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 00:19:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2021-12-16 00:19:14,841 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 39 [2021-12-16 00:19:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:19:14,842 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2021-12-16 00:19:14,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 00:19:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2021-12-16 00:19:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 00:19:14,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:19:14,843 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:14,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 00:19:15,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:15,060 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:19:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:19:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1954831506, now seen corresponding path program 1 times [2021-12-16 00:19:15,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:19:15,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817405620] [2021-12-16 00:19:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:15,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:19:15,071 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:19:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665243847] [2021-12-16 00:19:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:15,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:15,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:19:15,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:19:15,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:19:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:19:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:19:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 00:19:15,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:19:15,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:19:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817405620] [2021-12-16 00:19:15,184 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:19:15,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665243847] [2021-12-16 00:19:15,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665243847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:19:15,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:19:15,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:19:15,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113983618] [2021-12-16 00:19:15,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:19:15,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:19:15,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:19:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:19:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:19:15,186 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 00:19:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:19:15,220 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2021-12-16 00:19:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:19:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2021-12-16 00:19:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:19:15,221 INFO L225 Difference]: With dead ends: 72 [2021-12-16 00:19:15,221 INFO L226 Difference]: Without dead ends: 70 [2021-12-16 00:19:15,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:19:15,222 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:19:15,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:19:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-16 00:19:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-16 00:19:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 28 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 00:19:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 97 transitions. [2021-12-16 00:19:15,231 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 97 transitions. Word has length 45 [2021-12-16 00:19:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:19:15,232 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 97 transitions. [2021-12-16 00:19:15,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 00:19:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 97 transitions. [2021-12-16 00:19:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 00:19:15,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:19:15,233 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:15,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 00:19:15,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:15,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:19:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:19:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1322486933, now seen corresponding path program 1 times [2021-12-16 00:19:15,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:19:15,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610653277] [2021-12-16 00:19:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:15,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:19:15,460 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:19:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371557831] [2021-12-16 00:19:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:15,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:15,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:19:15,462 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:19:15,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:19:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 00:19:15,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:19:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-16 00:19:15,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:19:15,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:19:15,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610653277] [2021-12-16 00:19:15,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:19:15,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371557831] [2021-12-16 00:19:15,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371557831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:19:15,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:19:15,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:19:15,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112118669] [2021-12-16 00:19:15,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:19:15,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:19:15,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:19:15,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:19:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:19:15,570 INFO L87 Difference]: Start difference. First operand 70 states and 97 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 00:19:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:19:15,597 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2021-12-16 00:19:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:19:15,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-12-16 00:19:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:19:15,599 INFO L225 Difference]: With dead ends: 80 [2021-12-16 00:19:15,599 INFO L226 Difference]: Without dead ends: 77 [2021-12-16 00:19:15,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:19:15,612 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:19:15,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 142 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:19:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-16 00:19:15,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-16 00:19:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-16 00:19:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-12-16 00:19:15,620 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 47 [2021-12-16 00:19:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:19:15,620 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-12-16 00:19:15,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 00:19:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-12-16 00:19:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 00:19:15,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:19:15,622 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:15,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 00:19:15,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:15,835 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:19:15,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:19:15,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1617953190, now seen corresponding path program 1 times [2021-12-16 00:19:15,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:19:15,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327839259] [2021-12-16 00:19:15,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:15,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:19:15,845 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:19:15,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810671613] [2021-12-16 00:19:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:15,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:15,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:19:15,859 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:19:15,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:19:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:15,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 00:19:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:19:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 00:19:15,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:19:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 00:19:16,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:19:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327839259] [2021-12-16 00:19:16,095 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:19:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810671613] [2021-12-16 00:19:16,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810671613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:19:16,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:19:16,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-16 00:19:16,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882046434] [2021-12-16 00:19:16,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:19:16,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 00:19:16,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:19:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 00:19:16,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:19:16,097 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 00:19:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:19:16,182 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-12-16 00:19:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 00:19:16,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-12-16 00:19:16,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:19:16,183 INFO L225 Difference]: With dead ends: 84 [2021-12-16 00:19:16,183 INFO L226 Difference]: Without dead ends: 80 [2021-12-16 00:19:16,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:19:16,184 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:19:16,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 150 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:19:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-16 00:19:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-16 00:19:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-16 00:19:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2021-12-16 00:19:16,192 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 50 [2021-12-16 00:19:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:19:16,192 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2021-12-16 00:19:16,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 00:19:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2021-12-16 00:19:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 00:19:16,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:19:16,193 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:16,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 00:19:16,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:16,408 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:19:16,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:19:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash 860577929, now seen corresponding path program 2 times [2021-12-16 00:19:16,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:19:16,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093338092] [2021-12-16 00:19:16,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:16,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:19:16,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:19:16,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582688288] [2021-12-16 00:19:16,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:19:16,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:16,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:19:16,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:19:16,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 00:19:16,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:19:16,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:19:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 00:19:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:19:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 00:19:16,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:19:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-16 00:19:16,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:19:16,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093338092] [2021-12-16 00:19:16,739 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:19:16,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582688288] [2021-12-16 00:19:16,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582688288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:19:16,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 00:19:16,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-16 00:19:16,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948336305] [2021-12-16 00:19:16,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 00:19:16,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:19:16,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:19:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:19:16,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:19:16,741 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-16 00:19:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:19:17,171 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2021-12-16 00:19:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:19:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 52 [2021-12-16 00:19:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:19:17,173 INFO L225 Difference]: With dead ends: 106 [2021-12-16 00:19:17,173 INFO L226 Difference]: Without dead ends: 99 [2021-12-16 00:19:17,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:19:17,174 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 00:19:17,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 218 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 00:19:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-16 00:19:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2021-12-16 00:19:17,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-16 00:19:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2021-12-16 00:19:17,182 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 52 [2021-12-16 00:19:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:19:17,183 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2021-12-16 00:19:17,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-16 00:19:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2021-12-16 00:19:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 00:19:17,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:19:17,184 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:17,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-16 00:19:17,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:17,402 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:19:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:19:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1236716699, now seen corresponding path program 1 times [2021-12-16 00:19:17,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:19:17,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516499596] [2021-12-16 00:19:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:17,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:19:17,426 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-16 00:19:17,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998225187] [2021-12-16 00:19:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:19:17,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:19:17,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:19:17,439 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:19:17,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 00:19:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:19:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 00:19:17,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:19:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 00:19:17,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:19:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-16 00:19:17,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:19:17,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516499596] [2021-12-16 00:19:17,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 00:19:17,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998225187] [2021-12-16 00:19:17,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998225187] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 00:19:17,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:19:17,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2021-12-16 00:19:17,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301040819] [2021-12-16 00:19:17,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:19:17,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:19:17,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:19:17,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:19:17,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 00:19:17,730 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 00:19:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:19:17,755 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-12-16 00:19:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:19:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-16 00:19:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:19:17,756 INFO L225 Difference]: With dead ends: 84 [2021-12-16 00:19:17,756 INFO L226 Difference]: Without dead ends: 0 [2021-12-16 00:19:17,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:19:17,760 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:19:17,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 102 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:19:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-16 00:19:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-16 00:19:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:19:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-16 00:19:17,762 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2021-12-16 00:19:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:19:17,762 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 00:19:17,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 00:19:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-16 00:19:17,763 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-16 00:19:17,765 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-16 00:19:17,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 00:19:17,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 00:19:17,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-16 00:19:20,122 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= (+ .cse0 .cse1) |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-16 00:19:20,122 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-16 00:19:20,123 INFO L861 garLoopResultBuilder]: At program point L58(lines 18 59) the Hoare annotation is: true [2021-12-16 00:19:20,123 INFO L861 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2021-12-16 00:19:20,123 INFO L854 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|))) [2021-12-16 00:19:20,123 INFO L854 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= (+ .cse0 .cse1) |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-16 00:19:20,123 INFO L858 garLoopResultBuilder]: For program point L38(lines 35 52) no Hoare annotation was computed. [2021-12-16 00:19:20,123 INFO L854 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~a~0#1| (+ .cse0 .cse1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-16 00:19:20,123 INFO L854 garLoopResultBuilder]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~a~0#1| (+ .cse0 .cse1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-16 00:19:20,123 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-16 00:19:20,123 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-16 00:19:20,123 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-16 00:19:20,123 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-12-16 00:19:20,123 INFO L858 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2021-12-16 00:19:20,123 INFO L861 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2021-12-16 00:19:20,123 INFO L861 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: true [2021-12-16 00:19:20,124 INFO L854 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse7 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse8 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse6 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|))) (let ((.cse1 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse2 (= |ULTIMATE.start_main_~b~0#1| (+ .cse5 .cse6))) (.cse3 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse4 (+ .cse7 .cse8)) (.cse0 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 .cse3) (and (= |ULTIMATE.start_main_~a~0#1| .cse4) .cse1 (= |ULTIMATE.start_main_~r~0#1| 0) .cse2 .cse3) (and (= .cse4 |ULTIMATE.start_main_~b~0#1|) (= (+ .cse5 .cse6 |ULTIMATE.start_main_~a~0#1|) (+ .cse7 |ULTIMATE.start_main_~b~0#1| .cse8)) .cse0 (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))))) [2021-12-16 00:19:20,124 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-12-16 00:19:20,124 INFO L854 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~a~0#1| (+ .cse0 .cse1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-16 00:19:20,124 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~a~0#1| (+ .cse0 .cse1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-16 00:19:20,124 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-16 00:19:20,124 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-12-16 00:19:20,124 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-12-16 00:19:20,127 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:19:20,128 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 00:19:20,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 12:19:20 BoogieIcfgContainer [2021-12-16 00:19:20,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 00:19:20,140 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 00:19:20,140 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 00:19:20,140 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 00:19:20,141 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:19:12" (3/4) ... [2021-12-16 00:19:20,143 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-16 00:19:20,148 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-16 00:19:20,149 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-16 00:19:20,151 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-16 00:19:20,151 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-16 00:19:20,151 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-16 00:19:20,152 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-16 00:19:20,177 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-16 00:19:20,177 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 00:19:20,178 INFO L158 Benchmark]: Toolchain (without parser) took 7866.10ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 77.2MB in the beginning and 102.7MB in the end (delta: -25.5MB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2021-12-16 00:19:20,178 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 79.7MB. Free memory was 37.7MB in the beginning and 37.7MB in the end (delta: 34.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 00:19:20,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.13ms. Allocated memory is still 107.0MB. Free memory was 76.9MB in the beginning and 83.8MB in the end (delta: -6.9MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. [2021-12-16 00:19:20,179 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.20ms. Allocated memory is still 107.0MB. Free memory was 83.8MB in the beginning and 82.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 00:19:20,180 INFO L158 Benchmark]: Boogie Preprocessor took 35.74ms. Allocated memory is still 107.0MB. Free memory was 82.2MB in the beginning and 81.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 00:19:20,180 INFO L158 Benchmark]: RCFGBuilder took 265.21ms. Allocated memory is still 107.0MB. Free memory was 81.0MB in the beginning and 71.4MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 00:19:20,181 INFO L158 Benchmark]: TraceAbstraction took 7286.04ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 71.0MB in the beginning and 105.8MB in the end (delta: -34.8MB). Peak memory consumption was 62.2MB. Max. memory is 16.1GB. [2021-12-16 00:19:20,181 INFO L158 Benchmark]: Witness Printer took 37.37ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 102.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-16 00:19:20,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 79.7MB. Free memory was 37.7MB in the beginning and 37.7MB in the end (delta: 34.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.13ms. Allocated memory is still 107.0MB. Free memory was 76.9MB in the beginning and 83.8MB in the end (delta: -6.9MB). Peak memory consumption was 9.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.20ms. Allocated memory is still 107.0MB. Free memory was 83.8MB in the beginning and 82.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.74ms. Allocated memory is still 107.0MB. Free memory was 82.2MB in the beginning and 81.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 265.21ms. Allocated memory is still 107.0MB. Free memory was 81.0MB in the beginning and 71.4MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 7286.04ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 71.0MB in the beginning and 105.8MB in the end (delta: -34.8MB). Peak memory consumption was 62.2MB. Max. memory is 16.1GB. * Witness Printer took 37.37ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 102.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 9, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 88 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 65 mSDsluCounter, 1202 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 869 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 388 IncrementalHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 333 mSDtfsCounter, 388 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 610 GetRequests, 545 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=8, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 54 PreInvPairs, 90 NumberOfFragments, 328 HoareAnnotationTreeSize, 54 FomulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 1640 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 390 NumberOfCodeBlocks, 390 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 616 ConstructedInterpolants, 0 QuantifiedInterpolants, 1677 SizeOfPredicates, 18 NumberOfNonLiveVariables, 959 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 650/692 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (a == x * p + y * r && y * s + x * q + a == x * p + b + y * r) && q * r + 1 == s * p - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-16 00:19:20,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE