./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/bresenham-ll_valuebound10.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 4018f196b5be3ea7c518259557cd649a90434a9cacf1ef4108caf962c0feb788 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:10:16,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:10:16,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:10:16,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:10:16,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:10:16,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:10:16,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:10:16,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:10:16,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:10:16,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:10:16,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:10:16,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:10:16,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:10:16,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:10:16,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:10:16,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:10:16,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:10:16,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:10:16,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:10:16,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:10:16,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:10:16,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:10:16,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:10:16,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:10:16,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:10:16,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:10:16,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:10:16,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:10:16,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:10:16,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:10:16,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:10:16,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:10:16,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:10:16,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:10:16,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:10:16,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:10:16,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:10:16,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:10:16,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:10:16,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:10:16,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:10:16,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 00:10:16,709 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:10:16,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:10:16,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:10:16,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:10:16,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:10:16,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:10:16,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:10:16,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:10:16,712 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:10:16,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:10:16,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:10:16,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 00:10:16,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:10:16,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:10:16,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:10:16,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:10:16,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:10:16,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:10:16,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:10:16,715 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:10:16,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:10:16,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:10:16,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:10:16,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:10:16,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:10:16,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:10:16,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:10:16,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:10:16,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 00:10:16,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 00:10:16,717 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:10:16,717 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:10:16,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:10:16,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018f196b5be3ea7c518259557cd649a90434a9cacf1ef4108caf962c0feb788 [2021-12-28 00:10:17,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:10:17,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:10:17,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:10:17,081 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:10:17,083 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:10:17,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c [2021-12-28 00:10:17,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec7df4b27/7fd3716072694d8abcbbecfc0b5e9bd8/FLAG2dd1facff [2021-12-28 00:10:17,564 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:10:17,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound10.c [2021-12-28 00:10:17,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec7df4b27/7fd3716072694d8abcbbecfc0b5e9bd8/FLAG2dd1facff [2021-12-28 00:10:17,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec7df4b27/7fd3716072694d8abcbbecfc0b5e9bd8 [2021-12-28 00:10:17,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:10:17,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:10:17,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:10:17,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:10:17,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:10:17,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ff66c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17, skipping insertion in model container [2021-12-28 00:10:17,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:10:17,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:10:17,726 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/bresenham-ll_valuebound10.c[597,610] [2021-12-28 00:10:17,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:10:17,746 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:10:17,756 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/bresenham-ll_valuebound10.c[597,610] [2021-12-28 00:10:17,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:10:17,777 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:10:17,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17 WrapperNode [2021-12-28 00:10:17,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:10:17,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:10:17,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:10:17,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:10:17,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,838 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2021-12-28 00:10:17,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:10:17,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:10:17,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:10:17,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:10:17,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:10:17,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:10:17,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:10:17,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:10:17,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (1/1) ... [2021-12-28 00:10:17,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:10:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:10:17,888 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) [2021-12-28 00:10:17,905 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 [2021-12-28 00:10:17,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:10:17,930 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 00:10:17,930 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 00:10:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 00:10:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:10:17,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:10:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 00:10:17,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 00:10:17,989 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:10:17,991 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:10:18,150 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:10:18,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:10:18,156 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 00:10:18,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:10:18 BoogieIcfgContainer [2021-12-28 00:10:18,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:10:18,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:10:18,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:10:18,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:10:18,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:10:17" (1/3) ... [2021-12-28 00:10:18,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f95d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:10:18, skipping insertion in model container [2021-12-28 00:10:18,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:10:17" (2/3) ... [2021-12-28 00:10:18,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f95d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:10:18, skipping insertion in model container [2021-12-28 00:10:18,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:10:18" (3/3) ... [2021-12-28 00:10:18,164 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound10.c [2021-12-28 00:10:18,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:10:18,188 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:10:18,249 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:10:18,259 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 [2021-12-28 00:10:18,260 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:10:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:10:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 00:10:18,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:10:18,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:10:18,296 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:10:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:10:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash 689891435, now seen corresponding path program 1 times [2021-12-28 00:10:18,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:10:18,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102030047] [2021-12-28 00:10:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:18,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:10:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:10:18,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:10:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:10:18,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 00:10:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:10:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 00:10:18,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:10:18,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102030047] [2021-12-28 00:10:18,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102030047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:10:18,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:10:18,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 00:10:18,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749117645] [2021-12-28 00:10:18,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:10:18,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 00:10:18,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:10:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 00:10:18,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:10:18,487 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:10:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:10:18,507 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-12-28 00:10:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 00:10:18,510 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-12-28 00:10:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:10:18,517 INFO L225 Difference]: With dead ends: 51 [2021-12-28 00:10:18,517 INFO L226 Difference]: Without dead ends: 23 [2021-12-28 00:10:18,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:10:18,524 INFO L933 BasicCegarLoop]: 30 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, 30 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 [2021-12-28 00:10:18,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:10:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-28 00:10:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-28 00:10:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 00:10:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-28 00:10:18,550 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2021-12-28 00:10:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:10:18,551 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-28 00:10:18,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 00:10:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-28 00:10:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-28 00:10:18,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:10:18,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:10:18,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 00:10:18,553 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:10:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:10:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash 90086127, now seen corresponding path program 1 times [2021-12-28 00:10:18,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:10:18,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472800338] [2021-12-28 00:10:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:18,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:10:18,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:10:18,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942754718] [2021-12-28 00:10:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:18,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:10:18,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:10:18,579 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) [2021-12-28 00:10:18,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 00:10:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:10:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-28 00:10:18,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:10:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 00:10:18,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:10:18,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:10:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472800338] [2021-12-28 00:10:18,835 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:10:18,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942754718] [2021-12-28 00:10:18,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942754718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:10:18,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:10:18,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:10:18,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177026066] [2021-12-28 00:10:18,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:10:18,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:10:18,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:10:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:10:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:10:18,839 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 00:10:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:10:18,920 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-12-28 00:10:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 00:10:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-28 00:10:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:10:18,922 INFO L225 Difference]: With dead ends: 35 [2021-12-28 00:10:18,922 INFO L226 Difference]: Without dead ends: 31 [2021-12-28 00:10:18,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:10:18,924 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:10:18,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 81 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:10:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-28 00:10:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-12-28 00:10:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:10:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-28 00:10:18,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2021-12-28 00:10:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:10:18,932 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-28 00:10:18,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 00:10:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-28 00:10:18,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-28 00:10:18,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:10:18,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:10:18,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 00:10:19,143 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 [2021-12-28 00:10:19,144 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:10:19,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:10:19,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1522625704, now seen corresponding path program 1 times [2021-12-28 00:10:19,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:10:19,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370421464] [2021-12-28 00:10:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:19,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:10:19,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:10:19,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950205543] [2021-12-28 00:10:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:19,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:10:19,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:10:19,164 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) [2021-12-28 00:10:19,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 00:10:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:10:19,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-28 00:10:19,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:10:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 00:10:19,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:10:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 00:10:19,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:10:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370421464] [2021-12-28 00:10:19,619 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:10:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950205543] [2021-12-28 00:10:19,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950205543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:10:19,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:10:19,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2021-12-28 00:10:19,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253487027] [2021-12-28 00:10:19,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:10:19,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 00:10:19,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:10:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 00:10:19,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:10:19,622 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-28 00:10:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:10:19,917 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-28 00:10:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 00:10:19,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2021-12-28 00:10:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:10:19,918 INFO L225 Difference]: With dead ends: 44 [2021-12-28 00:10:19,918 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 00:10:19,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-28 00:10:19,920 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:10:19,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 106 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 00:10:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 00:10:19,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-12-28 00:10:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-28 00:10:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-28 00:10:19,927 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-12-28 00:10:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:10:19,927 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-28 00:10:19,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-28 00:10:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-28 00:10:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 00:10:19,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:10:19,928 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:10:19,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 00:10:20,151 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 [2021-12-28 00:10:20,152 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:10:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:10:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1035193378, now seen corresponding path program 1 times [2021-12-28 00:10:20,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:10:20,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500550745] [2021-12-28 00:10:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:20,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:10:20,169 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:10:20,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822312625] [2021-12-28 00:10:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:20,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:10:20,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:10:20,171 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) [2021-12-28 00:10:20,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 00:10:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:10:20,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-28 00:10:20,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:10:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 00:10:20,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:10:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 00:10:20,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:10:20,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500550745] [2021-12-28 00:10:20,922 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:10:20,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822312625] [2021-12-28 00:10:20,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822312625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:10:20,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:10:20,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-12-28 00:10:20,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473298920] [2021-12-28 00:10:20,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:10:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-28 00:10:20,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:10:20,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-28 00:10:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-28 00:10:20,925 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-28 00:10:21,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:10:21,476 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-12-28 00:10:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-28 00:10:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-12-28 00:10:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:10:21,477 INFO L225 Difference]: With dead ends: 56 [2021-12-28 00:10:21,478 INFO L226 Difference]: Without dead ends: 48 [2021-12-28 00:10:21,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 00:10:21,479 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:10:21,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 197 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-28 00:10:21,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-28 00:10:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2021-12-28 00:10:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-28 00:10:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-28 00:10:21,488 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 35 [2021-12-28 00:10:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:10:21,488 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-28 00:10:21,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-28 00:10:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-28 00:10:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 00:10:21,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:10:21,490 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:10:21,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 00:10:21,703 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 [2021-12-28 00:10:21,703 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:10:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:10:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash 546586445, now seen corresponding path program 1 times [2021-12-28 00:10:21,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:10:21,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827587240] [2021-12-28 00:10:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:21,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:10:21,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:10:21,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243261427] [2021-12-28 00:10:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:21,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:10:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:10:21,728 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) [2021-12-28 00:10:21,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 00:10:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:10:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-28 00:10:21,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:10:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-28 00:10:24,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:10:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-28 00:10:24,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:10:24,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827587240] [2021-12-28 00:10:24,355 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:10:24,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243261427] [2021-12-28 00:10:24,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243261427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:10:24,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:10:24,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-12-28 00:10:24,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924567541] [2021-12-28 00:10:24,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:10:24,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 00:10:24,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:10:24,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 00:10:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:10:24,358 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 14 states, 10 states have (on average 2.8) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-28 00:10:26,372 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 [] [2021-12-28 00:10:30,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:10:32,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:10:34,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:10:36,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:10:38,517 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 [] [2021-12-28 00:10:40,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:10:40,775 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-12-28 00:10:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 00:10:40,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2021-12-28 00:10:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:10:40,777 INFO L225 Difference]: With dead ends: 52 [2021-12-28 00:10:40,777 INFO L226 Difference]: Without dead ends: 46 [2021-12-28 00:10:40,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2021-12-28 00:10:40,778 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 18 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:10:40,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 121 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 109 Invalid, 6 Unknown, 0 Unchecked, 12.1s Time] [2021-12-28 00:10:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-28 00:10:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-12-28 00:10:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 00:10:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-12-28 00:10:40,789 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 44 [2021-12-28 00:10:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:10:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-12-28 00:10:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-28 00:10:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-12-28 00:10:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 00:10:40,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:10:40,791 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:10:40,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 00:10:40,992 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 [2021-12-28 00:10:40,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:10:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:10:40,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1258851889, now seen corresponding path program 1 times [2021-12-28 00:10:40,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:10:40,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569141644] [2021-12-28 00:10:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:40,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:10:41,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:10:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506078509] [2021-12-28 00:10:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:41,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:10:41,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:10:41,005 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) [2021-12-28 00:10:41,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 00:10:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:10:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 00:10:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:10:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 00:10:41,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:10:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 00:10:41,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:10:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569141644] [2021-12-28 00:10:41,448 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:10:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506078509] [2021-12-28 00:10:41,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506078509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:10:41,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:10:41,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-28 00:10:41,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325885668] [2021-12-28 00:10:41,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:10:41,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 00:10:41,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:10:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 00:10:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:10:41,461 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-28 00:10:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:10:41,625 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-12-28 00:10:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 00:10:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 44 [2021-12-28 00:10:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:10:41,627 INFO L225 Difference]: With dead ends: 61 [2021-12-28 00:10:41,627 INFO L226 Difference]: Without dead ends: 55 [2021-12-28 00:10:41,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-12-28 00:10:41,628 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:10:41,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 178 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:10:41,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-28 00:10:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2021-12-28 00:10:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 00:10:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-28 00:10:41,640 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 44 [2021-12-28 00:10:41,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:10:41,642 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-28 00:10:41,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-28 00:10:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-28 00:10:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 00:10:41,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:10:41,650 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:10:41,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 00:10:41,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:10:41,860 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:10:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:10:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1465806458, now seen corresponding path program 2 times [2021-12-28 00:10:41,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:10:41,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856572554] [2021-12-28 00:10:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:41,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:10:41,870 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:10:41,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087363444] [2021-12-28 00:10:41,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 00:10:41,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:10:41,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:10:41,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:10:41,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 00:10:41,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 00:10:41,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:10:41,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 00:10:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:10:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 00:10:42,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:10:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 00:10:42,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:10:42,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856572554] [2021-12-28 00:10:42,353 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:10:42,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087363444] [2021-12-28 00:10:42,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087363444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:10:42,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:10:42,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-28 00:10:42,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448910712] [2021-12-28 00:10:42,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:10:42,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 00:10:42,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:10:42,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 00:10:42,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:10:42,358 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-28 00:10:42,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:10:42,529 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2021-12-28 00:10:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 00:10:42,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 53 [2021-12-28 00:10:42,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:10:42,531 INFO L225 Difference]: With dead ends: 74 [2021-12-28 00:10:42,531 INFO L226 Difference]: Without dead ends: 68 [2021-12-28 00:10:42,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-28 00:10:42,535 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:10:42,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 142 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:10:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-28 00:10:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2021-12-28 00:10:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 00:10:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-28 00:10:42,546 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 53 [2021-12-28 00:10:42,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:10:42,547 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-28 00:10:42,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-28 00:10:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-28 00:10:42,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 00:10:42,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:10:42,548 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:10:42,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 00:10:42,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:10:42,760 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:10:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:10:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash 614391490, now seen corresponding path program 3 times [2021-12-28 00:10:42,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:10:42,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144009511] [2021-12-28 00:10:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:10:42,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:10:42,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:10:42,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416995342] [2021-12-28 00:10:42,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 00:10:42,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:10:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:10:42,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:10:42,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 00:10:42,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-28 00:10:42,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:10:42,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-28 00:10:42,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:10:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 00:10:54,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:11:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 00:11:20,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:11:20,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144009511] [2021-12-28 00:11:20,607 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:11:20,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416995342] [2021-12-28 00:11:20,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416995342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:11:20,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:11:20,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2021-12-28 00:11:20,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635133149] [2021-12-28 00:11:20,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:11:20,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-28 00:11:20,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:11:20,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-28 00:11:20,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=497, Unknown=6, NotChecked=0, Total=600 [2021-12-28 00:11:20,609 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 25 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-28 00:11:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:11:30,575 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-12-28 00:11:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 00:11:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 53 [2021-12-28 00:11:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:11:30,576 INFO L225 Difference]: With dead ends: 62 [2021-12-28 00:11:30,576 INFO L226 Difference]: Without dead ends: 0 [2021-12-28 00:11:30,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=253, Invalid=1147, Unknown=6, NotChecked=0, Total=1406 [2021-12-28 00:11:30,578 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 00:11:30,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 107 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 181 Invalid, 0 Unknown, 43 Unchecked, 1.4s Time] [2021-12-28 00:11:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-28 00:11:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-28 00:11:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 00:11:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-28 00:11:30,579 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2021-12-28 00:11:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:11:30,580 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 00:11:30,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-28 00:11:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-28 00:11:30,580 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-28 00:11:30,582 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-28 00:11:30,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 00:11:30,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:11:30,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.