./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/divbin_valuebound1.i -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 ea97fe631de3abcfa1030cdb800e2845e2e97a42347e391a7c9fd401d3d0b815 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:33:31,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:33:31,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:33:31,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:33:31,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:33:31,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:33:31,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:33:31,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:33:31,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:33:31,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:33:31,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:33:31,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:33:31,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:33:31,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:33:31,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:33:31,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:33:31,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:33:31,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:33:31,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:33:31,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:33:31,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:33:31,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:33:31,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:33:31,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:33:31,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:33:31,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:33:31,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:33:31,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:33:31,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:33:31,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:33:31,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:33:31,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:33:31,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:33:31,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:33:31,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:33:31,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:33:31,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:33:31,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:33:31,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:33:31,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:33:31,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:33:31,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:33:31,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:33:31,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:33:31,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:33:31,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:33:31,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:33:31,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:33:31,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:33:31,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:33:31,536 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:33:31,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:33:31,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:33:31,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:33:31,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:33:31,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:33:31,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:33:31,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:33:31,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:33:31,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:33:31,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:33:31,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:33:31,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:33:31,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:33:31,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:33:31,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:33:31,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:33:31,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:33:31,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:33:31,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:33:31,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:33:31,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:33:31,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:33:31,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:33:31,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:33:31,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:33:31,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea97fe631de3abcfa1030cdb800e2845e2e97a42347e391a7c9fd401d3d0b815 [2021-12-21 12:33:31,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:33:31,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:33:31,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:33:31,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:33:31,817 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:33:31,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i [2021-12-21 12:33:31,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5feaac4e2/4fc48c8bb61b48d5afa8072725c03841/FLAG663b8f414 [2021-12-21 12:33:32,224 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:33:32,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i [2021-12-21 12:33:32,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5feaac4e2/4fc48c8bb61b48d5afa8072725c03841/FLAG663b8f414 [2021-12-21 12:33:32,647 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5feaac4e2/4fc48c8bb61b48d5afa8072725c03841 [2021-12-21 12:33:32,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:33:32,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:33:32,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:33:32,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:33:32,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:33:32,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a0bfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32, skipping insertion in model container [2021-12-21 12:33:32,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:33:32,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:33:32,825 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/divbin_valuebound1.i[950,963] [2021-12-21 12:33:32,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:33:32,845 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:33:32,861 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/divbin_valuebound1.i[950,963] [2021-12-21 12:33:32,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:33:32,888 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:33:32,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32 WrapperNode [2021-12-21 12:33:32,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:33:32,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:33:32,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:33:32,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:33:32,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,915 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-12-21 12:33:32,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:33:32,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:33:32,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:33:32,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:33:32,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:33:32,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:33:32,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:33:32,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:33:32,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (1/1) ... [2021-12-21 12:33:32,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:33:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:33:32,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:33:32,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:33:33,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:33:33,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 12:33:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 12:33:33,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:33:33,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:33:33,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:33:33,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:33:33,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:33:33,055 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:33:33,056 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:33:33,155 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:33:33,160 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:33:33,160 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 12:33:33,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:33:33 BoogieIcfgContainer [2021-12-21 12:33:33,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:33:33,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:33:33,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:33:33,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:33:33,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:33:32" (1/3) ... [2021-12-21 12:33:33,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed2c128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:33:33, skipping insertion in model container [2021-12-21 12:33:33,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:33:32" (2/3) ... [2021-12-21 12:33:33,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed2c128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:33:33, skipping insertion in model container [2021-12-21 12:33:33,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:33:33" (3/3) ... [2021-12-21 12:33:33,170 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound1.i [2021-12-21 12:33:33,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:33:33,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:33:33,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:33:33,222 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:33:33,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:33:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 12:33:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 12:33:33,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:33:33,256 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:33:33,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:33:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:33:33,261 INFO L85 PathProgramCache]: Analyzing trace with hash 913242413, now seen corresponding path program 1 times [2021-12-21 12:33:33,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:33:33,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737330722] [2021-12-21 12:33:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:33,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:33:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:33:33,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 12:33:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:33:33,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:33:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:33:33,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 12:33:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:33:33,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 12:33:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:33:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:33:33,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:33:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737330722] [2021-12-21 12:33:33,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737330722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:33:33,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:33:33,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:33:33,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827583076] [2021-12-21 12:33:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:33:33,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:33:33,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:33:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:33:33,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:33:33,522 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 12:33:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:33:33,553 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2021-12-21 12:33:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:33:33,556 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-12-21 12:33:33,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:33:33,569 INFO L225 Difference]: With dead ends: 55 [2021-12-21 12:33:33,569 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 12:33:33,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:33:33,581 INFO L933 BasicCegarLoop]: 35 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, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:33:33,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:33:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 12:33:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-21 12:33:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 12:33:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-21 12:33:33,629 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2021-12-21 12:33:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:33:33,630 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-21 12:33:33,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 12:33:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-12-21 12:33:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 12:33:33,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:33:33,634 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:33:33,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:33:33,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:33:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:33:33,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2061833476, now seen corresponding path program 1 times [2021-12-21 12:33:33,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:33:33,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905325923] [2021-12-21 12:33:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:33,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:33:33,693 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:33:33,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539285525] [2021-12-21 12:33:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:33,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:33:33,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:33:33,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:33:33,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:33:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:33:33,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 12:33:33,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:33:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 12:33:34,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:33:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:33:34,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:33:34,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905325923] [2021-12-21 12:33:34,381 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:33:34,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539285525] [2021-12-21 12:33:34,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539285525] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 12:33:34,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:33:34,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-21 12:33:34,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523951980] [2021-12-21 12:33:34,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:33:34,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:33:34,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:33:34,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:33:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:33:34,394 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:33:36,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:33:38,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 12:33:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:33:38,820 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-12-21 12:33:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:33:38,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-12-21 12:33:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:33:38,822 INFO L225 Difference]: With dead ends: 37 [2021-12-21 12:33:38,822 INFO L226 Difference]: Without dead ends: 34 [2021-12-21 12:33:38,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:33:38,823 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:33:38,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 95 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-12-21 12:33:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-21 12:33:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-21 12:33:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 12:33:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-21 12:33:38,831 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2021-12-21 12:33:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:33:38,833 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-21 12:33:38,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:33:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-21 12:33:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 12:33:38,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:33:38,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:33:38,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:33:39,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:33:39,048 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:33:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:33:39,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1044269705, now seen corresponding path program 1 times [2021-12-21 12:33:39,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:33:39,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667967678] [2021-12-21 12:33:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:39,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:33:39,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:33:39,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050765728] [2021-12-21 12:33:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:39,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:33:39,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:33:39,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:33:39,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:33:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:33:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 12:33:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:33:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 12:33:39,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:33:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:33:39,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:33:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667967678] [2021-12-21 12:33:39,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:33:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050765728] [2021-12-21 12:33:39,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050765728] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 12:33:39,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 12:33:39,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-21 12:33:39,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635747687] [2021-12-21 12:33:39,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:33:39,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:33:39,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:33:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:33:39,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:33:39,810 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:33:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:33:39,846 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-21 12:33:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:33:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-21 12:33:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:33:39,849 INFO L225 Difference]: With dead ends: 42 [2021-12-21 12:33:39,849 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 12:33:39,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:33:39,850 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:33:39,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 140 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2021-12-21 12:33:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 12:33:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-21 12:33:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 12:33:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-12-21 12:33:39,858 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 33 [2021-12-21 12:33:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:33:39,859 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-12-21 12:33:39,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 12:33:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-12-21 12:33:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 12:33:39,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:33:39,861 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:33:39,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:33:40,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 12:33:40,067 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:33:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:33:40,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1786164585, now seen corresponding path program 1 times [2021-12-21 12:33:40,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:33:40,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801492233] [2021-12-21 12:33:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:40,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:33:40,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:33:40,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302298153] [2021-12-21 12:33:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:40,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:33:40,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:33:40,084 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:33:40,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:33:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:33:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 12:33:40,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:33:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:33:40,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:33:40,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:33:40,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801492233] [2021-12-21 12:33:40,199 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:33:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302298153] [2021-12-21 12:33:40,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302298153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:33:40,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:33:40,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:33:40,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437957334] [2021-12-21 12:33:40,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:33:40,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:33:40,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:33:40,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:33:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:33:40,201 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 12:33:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:33:40,233 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-12-21 12:33:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:33:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-12-21 12:33:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:33:40,234 INFO L225 Difference]: With dead ends: 51 [2021-12-21 12:33:40,235 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 12:33:40,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:33:40,236 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:33:40,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:33:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 12:33:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-21 12:33:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 12:33:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-21 12:33:40,242 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 39 [2021-12-21 12:33:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:33:40,243 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-21 12:33:40,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 12:33:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-21 12:33:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 12:33:40,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:33:40,244 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:33:40,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 12:33:40,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:33:40,470 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:33:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:33:40,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1444020969, now seen corresponding path program 1 times [2021-12-21 12:33:40,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:33:40,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073014578] [2021-12-21 12:33:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:40,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:33:40,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:33:40,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151661441] [2021-12-21 12:33:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:40,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:33:40,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:33:40,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:33:40,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:33:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:33:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 12:33:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:33:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 12:33:40,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:33:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 12:33:40,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:33:40,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073014578] [2021-12-21 12:33:40,839 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 12:33:40,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151661441] [2021-12-21 12:33:40,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151661441] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:33:40,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 12:33:40,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-21 12:33:40,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840600267] [2021-12-21 12:33:40,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 12:33:40,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:33:40,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:33:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:33:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:33:40,843 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 12:33:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:33:41,068 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-21 12:33:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:33:41,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 39 [2021-12-21 12:33:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:33:41,069 INFO L225 Difference]: With dead ends: 39 [2021-12-21 12:33:41,069 INFO L226 Difference]: Without dead ends: 32 [2021-12-21 12:33:41,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:33:41,070 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:33:41,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:33:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-21 12:33:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-21 12:33:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 12:33:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-21 12:33:41,076 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 39 [2021-12-21 12:33:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:33:41,076 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-21 12:33:41,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 12:33:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-21 12:33:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 12:33:41,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:33:41,077 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:33:41,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:33:41,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:33:41,303 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:33:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:33:41,304 INFO L85 PathProgramCache]: Analyzing trace with hash 145189394, now seen corresponding path program 1 times [2021-12-21 12:33:41,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:33:41,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326855163] [2021-12-21 12:33:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:41,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:33:41,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 12:33:41,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055428084] [2021-12-21 12:33:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:33:41,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:33:41,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:33:41,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:33:41,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process