./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/prodbin-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 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 16:28:31,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 16:28:31,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 16:28:31,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 16:28:31,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 16:28:31,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 16:28:31,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 16:28:31,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 16:28:31,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 16:28:31,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 16:28:31,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 16:28:31,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 16:28:31,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 16:28:31,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 16:28:31,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 16:28:31,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 16:28:31,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 16:28:31,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 16:28:31,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 16:28:31,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 16:28:31,577 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 16:28:31,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 16:28:31,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 16:28:31,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 16:28:31,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 16:28:31,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 16:28:31,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 16:28:31,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 16:28:31,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 16:28:31,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 16:28:31,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 16:28:31,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 16:28:31,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 16:28:31,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 16:28:31,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 16:28:31,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 16:28:31,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 16:28:31,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 16:28:31,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 16:28:31,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 16:28:31,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 16:28:31,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 16:28:31,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 16:28:31,605 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 16:28:31,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 16:28:31,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 16:28:31,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 16:28:31,606 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 16:28:31,606 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 16:28:31,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 16:28:31,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 16:28:31,607 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 16:28:31,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 16:28:31,607 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 16:28:31,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 16:28:31,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 16:28:31,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 16:28:31,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 16:28:31,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 16:28:31,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 16:28:31,608 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 16:28:31,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 16:28:31,609 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 16:28:31,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 16:28:31,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 16:28:31,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 16:28:31,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 16:28:31,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:28:31,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 16:28:31,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 16:28:31,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 16:28:31,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 16:28:31,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 16:28:31,610 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 16:28:31,610 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 16:28:31,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 16:28:31,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 [2022-07-19 16:28:31,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 16:28:31,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 16:28:31,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 16:28:31,836 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 16:28:31,836 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 16:28:31,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2022-07-19 16:28:31,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43045a0ca/53c5796ca10f42899185a3c94f56580f/FLAGde48f77d9 [2022-07-19 16:28:32,197 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 16:28:32,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2022-07-19 16:28:32,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43045a0ca/53c5796ca10f42899185a3c94f56580f/FLAGde48f77d9 [2022-07-19 16:28:32,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43045a0ca/53c5796ca10f42899185a3c94f56580f [2022-07-19 16:28:32,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 16:28:32,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 16:28:32,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 16:28:32,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 16:28:32,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 16:28:32,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f78eecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32, skipping insertion in model container [2022-07-19 16:28:32,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 16:28:32,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 16:28:32,770 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/prodbin-ll_valuebound100.c[537,550] [2022-07-19 16:28:32,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:28:32,793 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 16:28:32,813 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/prodbin-ll_valuebound100.c[537,550] [2022-07-19 16:28:32,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 16:28:32,850 INFO L208 MainTranslator]: Completed translation [2022-07-19 16:28:32,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32 WrapperNode [2022-07-19 16:28:32,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 16:28:32,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 16:28:32,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 16:28:32,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 16:28:32,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,898 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-07-19 16:28:32,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 16:28:32,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 16:28:32,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 16:28:32,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 16:28:32,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 16:28:32,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 16:28:32,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 16:28:32,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 16:28:32,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (1/1) ... [2022-07-19 16:28:32,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 16:28:32,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:28:32,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 16:28:32,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 16:28:32,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 16:28:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 16:28:32,993 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 16:28:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 16:28:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 16:28:32,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 16:28:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 16:28:32,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 16:28:33,036 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 16:28:33,039 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 16:28:33,155 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 16:28:33,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 16:28:33,159 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 16:28:33,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:28:33 BoogieIcfgContainer [2022-07-19 16:28:33,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 16:28:33,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 16:28:33,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 16:28:33,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 16:28:33,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 04:28:32" (1/3) ... [2022-07-19 16:28:33,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c4e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:28:33, skipping insertion in model container [2022-07-19 16:28:33,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 04:28:32" (2/3) ... [2022-07-19 16:28:33,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c4e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 04:28:33, skipping insertion in model container [2022-07-19 16:28:33,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:28:33" (3/3) ... [2022-07-19 16:28:33,183 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.c [2022-07-19 16:28:33,203 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 16:28:33,204 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 16:28:33,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 16:28:33,270 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1bb35153, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ae68bef [2022-07-19 16:28:33,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 16:28:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 16:28:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 16:28:33,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:28:33,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:28:33,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:28:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:28:33,313 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2022-07-19 16:28:33,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:28:33,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521518026] [2022-07-19 16:28:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:28:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:33,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 16:28:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 16:28:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:33,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 16:28:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 16:28:33,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:28:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521518026] [2022-07-19 16:28:33,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521518026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:28:33,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:28:33,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 16:28:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454505404] [2022-07-19 16:28:33,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:28:33,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 16:28:33,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:28:33,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 16:28:33,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 16:28:33,482 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 16:28:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:28:33,497 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-07-19 16:28:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 16:28:33,498 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-07-19 16:28:33,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:28:33,504 INFO L225 Difference]: With dead ends: 51 [2022-07-19 16:28:33,504 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 16:28:33,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 16:28:33,513 INFO L413 NwaCegarLoop]: 31 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, 31 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 [2022-07-19 16:28:33,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:28:33,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 16:28:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 16:28:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 16:28:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-19 16:28:33,546 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2022-07-19 16:28:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:28:33,547 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-19 16:28:33,548 INFO L496 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 16:28:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-19 16:28:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 16:28:33,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:28:33,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:28:33,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 16:28:33,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:28:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:28:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2022-07-19 16:28:33,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:28:33,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649789371] [2022-07-19 16:28:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:28:33,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:28:33,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158938522] [2022-07-19 16:28:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:33,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:33,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:28:33,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:28:33,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 16:28:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:33,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 16:28:33,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:28:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 16:28:33,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:28:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:28:33,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649789371] [2022-07-19 16:28:33,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:28:33,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158938522] [2022-07-19 16:28:33,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158938522] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:28:33,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:28:33,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 16:28:33,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760623504] [2022-07-19 16:28:33,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:28:33,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 16:28:33,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:28:33,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 16:28:33,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 16:28:33,762 INFO L87 Difference]: Start difference. First operand 23 states and 27 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 16:28:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:28:33,829 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-07-19 16:28:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 16:28:33,829 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-07-19 16:28:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:28:33,831 INFO L225 Difference]: With dead ends: 35 [2022-07-19 16:28:33,831 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 16:28:33,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:28:33,832 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:28:33,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:28:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 16:28:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-07-19 16:28:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 16:28:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-19 16:28:33,842 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2022-07-19 16:28:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:28:33,843 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-19 16:28:33,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 16:28:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-19 16:28:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 16:28:33,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:28:33,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:28:33,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 16:28:34,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:34,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:28:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:28:34,054 INFO L85 PathProgramCache]: Analyzing trace with hash -895979555, now seen corresponding path program 1 times [2022-07-19 16:28:34,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:28:34,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130345360] [2022-07-19 16:28:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:34,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:28:34,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:28:34,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247654241] [2022-07-19 16:28:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:34,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:28:34,090 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:28:34,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 16:28:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 16:28:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:28:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 16:28:34,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 16:28:34,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:28:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130345360] [2022-07-19 16:28:34,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:28:34,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247654241] [2022-07-19 16:28:34,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247654241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 16:28:34,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 16:28:34,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 16:28:34,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321876801] [2022-07-19 16:28:34,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 16:28:34,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 16:28:34,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:28:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 16:28:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 16:28:34,157 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 16:28:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:28:34,201 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-19 16:28:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 16:28:34,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-19 16:28:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:28:34,202 INFO L225 Difference]: With dead ends: 39 [2022-07-19 16:28:34,202 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 16:28:34,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 16:28:34,203 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 16:28:34,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 69 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 16:28:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 16:28:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-19 16:28:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 16:28:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-19 16:28:34,207 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 30 [2022-07-19 16:28:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:28:34,208 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-19 16:28:34,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 16:28:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-19 16:28:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 16:28:34,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:28:34,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:28:34,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 16:28:34,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 16:28:34,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:28:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:28:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2022-07-19 16:28:34,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:28:34,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763480628] [2022-07-19 16:28:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:28:34,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:28:34,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565488281] [2022-07-19 16:28:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:34,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:34,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:28:34,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:28:34,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 16:28:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 16:28:34,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:28:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 16:28:39,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:28:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 16:28:46,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:28:46,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763480628] [2022-07-19 16:28:46,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:28:46,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565488281] [2022-07-19 16:28:46,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565488281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:28:46,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:28:46,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-07-19 16:28:46,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891770381] [2022-07-19 16:28:46,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:28:46,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 16:28:46,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:28:46,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 16:28:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2022-07-19 16:28:46,926 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 16:28:52,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:28:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:28:53,595 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-07-19 16:28:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 16:28:53,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-07-19 16:28:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:28:53,597 INFO L225 Difference]: With dead ends: 44 [2022-07-19 16:28:53,597 INFO L226 Difference]: Without dead ends: 42 [2022-07-19 16:28:53,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=63, Invalid=242, Unknown=1, NotChecked=0, Total=306 [2022-07-19 16:28:53,599 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-19 16:28:53,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-07-19 16:28:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-19 16:28:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-07-19 16:28:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 16:28:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-07-19 16:28:53,604 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 33 [2022-07-19 16:28:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:28:53,604 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-07-19 16:28:53,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 16:28:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-07-19 16:28:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 16:28:53,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:28:53,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:28:53,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 16:28:53,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:53,826 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:28:53,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:28:53,827 INFO L85 PathProgramCache]: Analyzing trace with hash 403305007, now seen corresponding path program 1 times [2022-07-19 16:28:53,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:28:53,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175878873] [2022-07-19 16:28:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:53,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:28:53,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:28:53,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870954734] [2022-07-19 16:28:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:53,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:53,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:28:53,852 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:28:53,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 16:28:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:53,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 16:28:53,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:28:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 16:28:55,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:28:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 16:28:55,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:28:55,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175878873] [2022-07-19 16:28:55,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:28:55,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870954734] [2022-07-19 16:28:55,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870954734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:28:55,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:28:55,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-19 16:28:55,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386999107] [2022-07-19 16:28:55,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:28:55,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 16:28:55,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:28:55,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 16:28:55,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-19 16:28:55,992 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 16:28:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:28:56,707 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-07-19 16:28:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 16:28:56,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2022-07-19 16:28:56,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:28:56,709 INFO L225 Difference]: With dead ends: 73 [2022-07-19 16:28:56,709 INFO L226 Difference]: Without dead ends: 66 [2022-07-19 16:28:56,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-07-19 16:28:56,710 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 16:28:56,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 107 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 16:28:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-19 16:28:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-07-19 16:28:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 16:28:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-07-19 16:28:56,717 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2022-07-19 16:28:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:28:56,718 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-07-19 16:28:56,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 16:28:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-07-19 16:28:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 16:28:56,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:28:56,719 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:28:56,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 16:28:56,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:56,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:28:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:28:56,931 INFO L85 PathProgramCache]: Analyzing trace with hash 685673296, now seen corresponding path program 1 times [2022-07-19 16:28:56,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:28:56,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524717082] [2022-07-19 16:28:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:56,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:28:56,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:28:56,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170301073] [2022-07-19 16:28:56,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:56,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:56,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:28:56,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:28:56,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 16:28:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 16:28:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:28:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 16:28:57,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:28:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 16:28:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:28:57,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524717082] [2022-07-19 16:28:57,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:28:57,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170301073] [2022-07-19 16:28:57,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170301073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:28:57,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:28:57,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-19 16:28:57,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021046669] [2022-07-19 16:28:57,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:28:57,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 16:28:57,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:28:57,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 16:28:57,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-19 16:28:57,116 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 16:28:59,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:28:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:28:59,224 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-07-19 16:28:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 16:28:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-07-19 16:28:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:28:59,226 INFO L225 Difference]: With dead ends: 61 [2022-07-19 16:28:59,226 INFO L226 Difference]: Without dead ends: 54 [2022-07-19 16:28:59,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-19 16:28:59,226 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 16:28:59,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 69 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 16:28:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-19 16:28:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-19 16:28:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 16:28:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-19 16:28:59,232 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 39 [2022-07-19 16:28:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:28:59,232 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-19 16:28:59,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 16:28:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-19 16:28:59,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 16:28:59,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:28:59,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:28:59,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 16:28:59,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:59,433 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:28:59,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:28:59,443 INFO L85 PathProgramCache]: Analyzing trace with hash -662815268, now seen corresponding path program 1 times [2022-07-19 16:28:59,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:28:59,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210731196] [2022-07-19 16:28:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:59,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:28:59,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:28:59,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464149408] [2022-07-19 16:28:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:28:59,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:28:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:28:59,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:28:59,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 16:28:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 16:28:59,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 16:28:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:29:25,429 WARN L233 SmtUtils]: Spent 12.23s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 16:29:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 16:29:32,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:29:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 16:29:35,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:29:35,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210731196] [2022-07-19 16:29:35,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:29:35,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464149408] [2022-07-19 16:29:35,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464149408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:29:35,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:29:35,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-07-19 16:29:35,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004530760] [2022-07-19 16:29:35,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:29:35,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 16:29:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:29:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 16:29:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-19 16:29:35,433 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 16:29:37,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:29:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:29:46,327 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2022-07-19 16:29:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 16:29:46,327 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2022-07-19 16:29:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:29:46,328 INFO L225 Difference]: With dead ends: 73 [2022-07-19 16:29:46,328 INFO L226 Difference]: Without dead ends: 71 [2022-07-19 16:29:46,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-07-19 16:29:46,329 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-19 16:29:46,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 120 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 171 Invalid, 1 Unknown, 26 Unchecked, 3.8s Time] [2022-07-19 16:29:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-19 16:29:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-07-19 16:29:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 55 states have internal predecessors, (59), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-19 16:29:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-07-19 16:29:46,337 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 42 [2022-07-19 16:29:46,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:29:46,343 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-07-19 16:29:46,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 16:29:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-07-19 16:29:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 16:29:46,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:29:46,346 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:29:46,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 16:29:46,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:29:46,549 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:29:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:29:46,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1448142086, now seen corresponding path program 2 times [2022-07-19 16:29:46,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:29:46,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834139556] [2022-07-19 16:29:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:29:46,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:29:46,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:29:46,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013406777] [2022-07-19 16:29:46,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 16:29:46,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:29:46,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:29:46,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:29:46,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 16:29:46,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 16:29:46,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:29:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-19 16:29:46,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:30:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 16:30:02,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:30:15,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:30:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834139556] [2022-07-19 16:30:15,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:30:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013406777] [2022-07-19 16:30:15,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013406777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 16:30:15,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-19 16:30:15,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-19 16:30:15,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306495492] [2022-07-19 16:30:15,260 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-19 16:30:15,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 16:30:15,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:30:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 16:30:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=444, Unknown=1, NotChecked=0, Total=552 [2022-07-19 16:30:15,261 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 16:30:17,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:21,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:24,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:27,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:28,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:30,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:32,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:34,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:37,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:38,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:30:38,988 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-07-19 16:30:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 16:30:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 60 [2022-07-19 16:30:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:30:38,989 INFO L225 Difference]: With dead ends: 97 [2022-07-19 16:30:38,990 INFO L226 Difference]: Without dead ends: 95 [2022-07-19 16:30:38,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=120, Invalid=529, Unknown=1, NotChecked=0, Total=650 [2022-07-19 16:30:38,992 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2022-07-19 16:30:38,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 193 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 449 Invalid, 5 Unknown, 0 Unchecked, 23.7s Time] [2022-07-19 16:30:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-19 16:30:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2022-07-19 16:30:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 72 states have internal predecessors, (77), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-19 16:30:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-07-19 16:30:39,002 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 60 [2022-07-19 16:30:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:30:39,003 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-07-19 16:30:39,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 16:30:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-07-19 16:30:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 16:30:39,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 16:30:39,004 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 16:30:39,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 16:30:39,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:30:39,223 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 16:30:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 16:30:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1307593476, now seen corresponding path program 3 times [2022-07-19 16:30:39,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 16:30:39,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376978965] [2022-07-19 16:30:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 16:30:39,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 16:30:39,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 16:30:39,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74637969] [2022-07-19 16:30:39,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 16:30:39,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 16:30:39,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 16:30:39,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 16:30:39,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 16:30:39,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 16:30:39,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 16:30:39,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 16:30:39,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 16:30:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 16:30:40,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 16:30:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 16:30:41,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 16:30:41,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376978965] [2022-07-19 16:30:41,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 16:30:41,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74637969] [2022-07-19 16:30:41,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74637969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 16:30:41,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 16:30:41,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 31 [2022-07-19 16:30:41,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123036311] [2022-07-19 16:30:41,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 16:30:41,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 16:30:41,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 16:30:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 16:30:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2022-07-19 16:30:41,740 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 28 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-19 16:30:43,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:48,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:52,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:55,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:58,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:30:59,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 16:31:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 16:31:13,693 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2022-07-19 16:31:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 16:31:13,694 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 28 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 60 [2022-07-19 16:31:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 16:31:13,694 INFO L225 Difference]: With dead ends: 111 [2022-07-19 16:31:13,694 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 16:31:13,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=452, Invalid=1708, Unknown=2, NotChecked=0, Total=2162 [2022-07-19 16:31:13,696 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-07-19 16:31:13,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 126 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2022-07-19 16:31:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 16:31:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 16:31:13,696 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) [2022-07-19 16:31:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 16:31:13,696 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2022-07-19 16:31:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 16:31:13,696 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 16:31:13,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 28 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-19 16:31:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 16:31:13,697 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 16:31:13,699 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 16:31:13,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 16:31:13,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 16:31:13,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 16:31:19,869 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 159 DAG size of output: 16 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-07-19 16:31:27,889 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 159 DAG size of output: 16 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-07-19 16:31:27,901 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-19 16:31:27,901 INFO L902 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-07-19 16:31:27,902 INFO L895 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 100)) [2022-07-19 16:31:27,902 INFO L902 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L902 garLoopResultBuilder]: At program point L48(lines 20 49) the Hoare annotation is: true [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 100) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse0) (= |ULTIMATE.start_main_~z~0#1| .cse0))) [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 100) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-07-19 16:31:27,902 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-07-19 16:31:27,903 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-07-19 16:31:27,903 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-07-19 16:31:27,903 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-07-19 16:31:27,905 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-07-19 16:31:27,906 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 16:31:27,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 04:31:27 BoogieIcfgContainer [2022-07-19 16:31:27,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 16:31:27,917 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 16:31:27,917 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 16:31:27,918 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 16:31:27,918 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 04:28:33" (3/4) ... [2022-07-19 16:31:27,920 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-19 16:31:27,923 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-07-19 16:31:27,923 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-19 16:31:27,926 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-07-19 16:31:27,928 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-19 16:31:27,928 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-19 16:31:27,929 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-19 16:31:27,954 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 16:31:27,954 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 16:31:27,955 INFO L158 Benchmark]: Toolchain (without parser) took 175334.15ms. Allocated memory was 100.7MB in the beginning and 132.1MB in the end (delta: 31.5MB). Free memory was 77.5MB in the beginning and 54.6MB in the end (delta: 22.9MB). Peak memory consumption was 54.0MB. Max. memory is 16.1GB. [2022-07-19 16:31:27,955 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 59.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 16:31:27,956 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.01ms. Allocated memory was 100.7MB in the beginning and 132.1MB in the end (delta: 31.5MB). Free memory was 77.5MB in the beginning and 107.9MB in the end (delta: -30.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 16:31:27,956 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.16ms. Allocated memory is still 132.1MB. Free memory was 107.9MB in the beginning and 106.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 16:31:27,956 INFO L158 Benchmark]: Boogie Preprocessor took 31.00ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 105.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 16:31:27,957 INFO L158 Benchmark]: RCFGBuilder took 229.63ms. Allocated memory is still 132.1MB. Free memory was 105.5MB in the beginning and 95.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 16:31:27,957 INFO L158 Benchmark]: TraceAbstraction took 174754.83ms. Allocated memory is still 132.1MB. Free memory was 95.0MB in the beginning and 56.8MB in the end (delta: 38.2MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. [2022-07-19 16:31:27,957 INFO L158 Benchmark]: Witness Printer took 37.18ms. Allocated memory is still 132.1MB. Free memory was 56.8MB in the beginning and 54.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 16:31:27,958 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 59.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.01ms. Allocated memory was 100.7MB in the beginning and 132.1MB in the end (delta: 31.5MB). Free memory was 77.5MB in the beginning and 107.9MB in the end (delta: -30.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.16ms. Allocated memory is still 132.1MB. Free memory was 107.9MB in the beginning and 106.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.00ms. Allocated memory is still 132.1MB. Free memory was 106.5MB in the beginning and 105.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 229.63ms. Allocated memory is still 132.1MB. Free memory was 105.5MB in the beginning and 95.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 174754.83ms. Allocated memory is still 132.1MB. Free memory was 95.0MB in the beginning and 56.8MB in the end (delta: 38.2MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. * Witness Printer took 37.18ms. Allocated memory is still 132.1MB. Free memory was 56.8MB in the beginning and 54.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. 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: 15]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 174.6s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 76.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 244 SdHoareTripleChecker+Valid, 48.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 236 mSDsluCounter, 925 SdHoareTripleChecker+Invalid, 47.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 26 IncrementalHoareTripleChecker+Unchecked, 734 mSDsCounter, 163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1601 IncrementalHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 163 mSolverCounterUnsat, 191 mSDtfsCounter, 1601 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 586 GetRequests, 428 SyntacticMatches, 11 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 62.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=8, InterpolantAutomatonStates: 104, 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, 25 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 32 PreInvPairs, 62 NumberOfFragments, 68 HoareAnnotationTreeSize, 32 FomulaSimplifications, 295 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2627 FormulaSimplificationTreeSizeReductionInter, 14.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 81.9s InterpolantComputationTime, 345 NumberOfCodeBlocks, 345 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 538 ConstructedInterpolants, 1 QuantifiedInterpolants, 4526 SizeOfPredicates, 31 NumberOfNonLiveVariables, 852 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 314/452 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: 34]: Loop Invariant Derived loop invariant: ((0 <= y && b <= 100) && 1 <= b) && z + x * y == a * b - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-19 16:31:28,019 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