./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/array-multidimensional/diff-2-n-u.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 cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:43:17,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:43:17,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:43:17,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:43:17,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:43:17,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:43:17,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:43:17,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:43:17,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:43:17,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:43:17,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:43:17,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:43:17,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:43:17,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:43:17,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:43:17,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:43:17,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:43:17,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:43:17,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:43:17,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:43:17,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:43:17,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:43:17,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:43:17,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:43:17,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:43:17,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:43:17,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:43:17,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:43:17,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:43:17,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:43:17,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:43:17,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:43:17,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:43:17,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:43:17,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:43:17,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:43:17,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:43:17,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:43:17,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:43:17,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:43:17,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:43:17,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:43:17,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:43:17,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:43:17,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:43:17,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:43:17,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:43:17,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:43:17,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:43:17,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:43:17,864 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:43:17,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:43:17,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:43:17,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:43:17,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:43:17,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:43:17,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:43:17,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:43:17,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:43:17,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:43:17,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:43:17,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:43:17,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:43:17,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:43:17,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:43:17,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:43:17,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:43:17,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:43:17,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:43:17,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:43:17,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:43:17,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:43:17,869 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:43:17,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:43:17,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:43:17,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:43:17,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 [2021-12-15 08:43:18,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:43:18,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:43:18,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:43:18,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:43:18,051 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:43:18,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2021-12-15 08:43:18,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/112162fe6/cdefecf950fa46c38e13824245bf4f25/FLAGc150649be [2021-12-15 08:43:18,477 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:43:18,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2021-12-15 08:43:18,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/112162fe6/cdefecf950fa46c38e13824245bf4f25/FLAGc150649be [2021-12-15 08:43:18,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/112162fe6/cdefecf950fa46c38e13824245bf4f25 [2021-12-15 08:43:18,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:43:18,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:43:18,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:43:18,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:43:18,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:43:18,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f6fb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18, skipping insertion in model container [2021-12-15 08:43:18,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:43:18,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:43:18,691 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/array-multidimensional/diff-2-n-u.c[322,335] [2021-12-15 08:43:18,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:43:18,726 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:43:18,736 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/array-multidimensional/diff-2-n-u.c[322,335] [2021-12-15 08:43:18,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:43:18,773 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:43:18,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18 WrapperNode [2021-12-15 08:43:18,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:43:18,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:43:18,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:43:18,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:43:18,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,817 INFO L137 Inliner]: procedures = 14, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2021-12-15 08:43:18,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:43:18,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:43:18,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:43:18,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:43:18,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:43:18,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:43:18,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:43:18,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:43:18,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (1/1) ... [2021-12-15 08:43:18,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:43:18,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:18,887 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) [2021-12-15 08:43:18,895 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 [2021-12-15 08:43:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:43:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:43:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:43:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:43:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:43:18,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:43:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:43:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:43:18,961 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:43:18,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:43:19,080 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:43:19,088 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:43:19,088 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-15 08:43:19,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:43:19 BoogieIcfgContainer [2021-12-15 08:43:19,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:43:19,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:43:19,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:43:19,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:43:19,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:43:18" (1/3) ... [2021-12-15 08:43:19,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1884846e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:43:19, skipping insertion in model container [2021-12-15 08:43:19,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:18" (2/3) ... [2021-12-15 08:43:19,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1884846e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:43:19, skipping insertion in model container [2021-12-15 08:43:19,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:43:19" (3/3) ... [2021-12-15 08:43:19,098 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2021-12-15 08:43:19,101 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:43:19,102 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:43:19,132 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:43:19,137 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 [2021-12-15 08:43:19,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:43:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 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) [2021-12-15 08:43:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 08:43:19,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:19,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:19,151 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:19,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1352657881, now seen corresponding path program 1 times [2021-12-15 08:43:19,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:19,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105051389] [2021-12-15 08:43:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:19,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:19,221 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:43:19,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448281537] [2021-12-15 08:43:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:19,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:19,228 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) [2021-12-15 08:43:19,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:43:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:19,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:43:19,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:43:19,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:43:19,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:19,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105051389] [2021-12-15 08:43:19,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:43:19,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448281537] [2021-12-15 08:43:19,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448281537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:43:19,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:43:19,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:43:19,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137330771] [2021-12-15 08:43:19,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:43:19,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:43:19,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:19,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:43:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:43:19,450 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 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) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-15 08:43:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:19,513 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2021-12-15 08:43:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:43:19,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) Word has length 12 [2021-12-15 08:43:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:19,520 INFO L225 Difference]: With dead ends: 51 [2021-12-15 08:43:19,520 INFO L226 Difference]: Without dead ends: 24 [2021-12-15 08:43:19,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:43:19,527 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:19,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 41 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:43:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-15 08:43:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-12-15 08:43:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 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) [2021-12-15 08:43:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2021-12-15 08:43:19,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 12 [2021-12-15 08:43:19,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:19,561 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2021-12-15 08:43:19,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-15 08:43:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2021-12-15 08:43:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 08:43:19,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:19,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:19,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 08:43:19,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-15 08:43:19,779 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash -68107374, now seen corresponding path program 1 times [2021-12-15 08:43:19,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:19,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680680060] [2021-12-15 08:43:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:19,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:19,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:43:19,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559117830] [2021-12-15 08:43:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:19,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:19,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:19,797 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) [2021-12-15 08:43:19,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:43:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:43:19,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:43:19,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:43:19,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:19,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680680060] [2021-12-15 08:43:19,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:43:19,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559117830] [2021-12-15 08:43:19,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559117830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:43:19,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:43:19,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:43:19,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627516297] [2021-12-15 08:43:19,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:43:19,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:43:19,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:43:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:43:19,901 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-15 08:43:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:19,936 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2021-12-15 08:43:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:43:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) Word has length 15 [2021-12-15 08:43:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:19,937 INFO L225 Difference]: With dead ends: 54 [2021-12-15 08:43:19,937 INFO L226 Difference]: Without dead ends: 35 [2021-12-15 08:43:19,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:43:19,938 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:19,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 30 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:43:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-15 08:43:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2021-12-15 08:43:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2021-12-15 08:43:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-12-15 08:43:19,943 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2021-12-15 08:43:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:19,944 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-12-15 08:43:19,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-15 08:43:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-12-15 08:43:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 08:43:19,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:19,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:19,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 08:43:20,161 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,SelfDestructingSolverStorable1 [2021-12-15 08:43:20,161 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1915152726, now seen corresponding path program 1 times [2021-12-15 08:43:20,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:20,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345309183] [2021-12-15 08:43:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:20,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:20,169 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:43:20,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630581326] [2021-12-15 08:43:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:20,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:20,188 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) [2021-12-15 08:43:20,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:43:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:20,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:43:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:43:20,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:43:20,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:20,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345309183] [2021-12-15 08:43:20,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:43:20,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630581326] [2021-12-15 08:43:20,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630581326] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:20,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:43:20,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-15 08:43:20,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727941536] [2021-12-15 08:43:20,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:20,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 08:43:20,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 08:43:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:43:20,352 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-12-15 08:43:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:20,447 INFO L93 Difference]: Finished difference Result 78 states and 106 transitions. [2021-12-15 08:43:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 08:43:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) Word has length 16 [2021-12-15 08:43:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:20,449 INFO L225 Difference]: With dead ends: 78 [2021-12-15 08:43:20,449 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 08:43:20,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-15 08:43:20,450 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:20,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 53 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:43:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 08:43:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2021-12-15 08:43:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 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) [2021-12-15 08:43:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-12-15 08:43:20,466 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 16 [2021-12-15 08:43:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:20,467 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-12-15 08:43:20,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2021-12-15 08:43:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-12-15 08:43:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 08:43:20,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:20,468 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:20,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:43:20,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:20,685 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:20,688 INFO L85 PathProgramCache]: Analyzing trace with hash -349301614, now seen corresponding path program 2 times [2021-12-15 08:43:20,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:20,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457225675] [2021-12-15 08:43:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:20,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:20,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:43:20,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482406394] [2021-12-15 08:43:20,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:43:20,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:20,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:20,699 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) [2021-12-15 08:43:20,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:43:20,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 08:43:20,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:20,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:43:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 08:43:20,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:43:20,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457225675] [2021-12-15 08:43:20,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:43:20,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482406394] [2021-12-15 08:43:20,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482406394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:43:20,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:43:20,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:43:20,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095167102] [2021-12-15 08:43:20,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:43:20,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:43:20,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:43:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:43:20,795 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-15 08:43:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:20,831 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2021-12-15 08:43:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:43:20,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) Word has length 19 [2021-12-15 08:43:20,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:20,833 INFO L225 Difference]: With dead ends: 107 [2021-12-15 08:43:20,834 INFO L226 Difference]: Without dead ends: 81 [2021-12-15 08:43:20,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:43:20,835 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:20,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 23 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:43:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-15 08:43:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 46. [2021-12-15 08:43:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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) [2021-12-15 08:43:20,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-12-15 08:43:20,841 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 19 [2021-12-15 08:43:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:20,841 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-12-15 08:43:20,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-15 08:43:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-12-15 08:43:20,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 08:43:20,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:20,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:20,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:43:21,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:21,059 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1717790278, now seen corresponding path program 1 times [2021-12-15 08:43:21,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:21,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423148941] [2021-12-15 08:43:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:21,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:21,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:43:21,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884108110] [2021-12-15 08:43:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:21,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:21,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:21,084 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) [2021-12-15 08:43:21,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:43:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:21,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 08:43:21,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 08:43:21,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 08:43:21,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423148941] [2021-12-15 08:43:21,388 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:43:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884108110] [2021-12-15 08:43:21,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884108110] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:21,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:43:21,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-15 08:43:21,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235053102] [2021-12-15 08:43:21,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:21,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:43:21,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:43:21,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:43:21,391 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-12-15 08:43:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:21,595 INFO L93 Difference]: Finished difference Result 144 states and 185 transitions. [2021-12-15 08:43:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 08:43:21,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) Word has length 33 [2021-12-15 08:43:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:21,597 INFO L225 Difference]: With dead ends: 144 [2021-12-15 08:43:21,597 INFO L226 Difference]: Without dead ends: 101 [2021-12-15 08:43:21,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-15 08:43:21,598 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 155 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:21,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 64 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:43:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-15 08:43:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2021-12-15 08:43:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 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) [2021-12-15 08:43:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-12-15 08:43:21,608 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 33 [2021-12-15 08:43:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:21,608 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-12-15 08:43:21,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-12-15 08:43:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-12-15 08:43:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 08:43:21,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:21,609 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:21,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-15 08:43:21,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:21,826 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:21,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:21,826 INFO L85 PathProgramCache]: Analyzing trace with hash 835130118, now seen corresponding path program 2 times [2021-12-15 08:43:21,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:21,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410827417] [2021-12-15 08:43:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:21,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:21,845 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:43:21,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473362867] [2021-12-15 08:43:21,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:43:21,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:21,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:21,876 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) [2021-12-15 08:43:21,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:43:22,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:43:22,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 08:43:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-15 08:43:22,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-15 08:43:22,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:22,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410827417] [2021-12-15 08:43:22,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:43:22,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473362867] [2021-12-15 08:43:22,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473362867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:22,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:43:22,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-15 08:43:22,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731916538] [2021-12-15 08:43:22,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:22,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 08:43:22,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 08:43:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-15 08:43:22,419 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 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) [2021-12-15 08:43:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:22,839 INFO L93 Difference]: Finished difference Result 276 states and 347 transitions. [2021-12-15 08:43:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 08:43:22,840 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 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) Word has length 51 [2021-12-15 08:43:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:22,841 INFO L225 Difference]: With dead ends: 276 [2021-12-15 08:43:22,841 INFO L226 Difference]: Without dead ends: 197 [2021-12-15 08:43:22,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 08:43:22,842 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 390 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:22,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 99 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:43:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-15 08:43:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 154. [2021-12-15 08:43:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 153 states have internal predecessors, (182), 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) [2021-12-15 08:43:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2021-12-15 08:43:22,854 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 51 [2021-12-15 08:43:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:22,854 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2021-12-15 08:43:22,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 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) [2021-12-15 08:43:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2021-12-15 08:43:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-15 08:43:22,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:22,855 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:22,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:43:23,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:23,083 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:23,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1578720390, now seen corresponding path program 3 times [2021-12-15 08:43:23,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:23,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470723218] [2021-12-15 08:43:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:23,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:23,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:43:23,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483706965] [2021-12-15 08:43:23,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:43:23,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:23,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:23,113 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) [2021-12-15 08:43:23,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:43:23,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-15 08:43:23,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:23,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:43:23,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2021-12-15 08:43:23,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2021-12-15 08:43:23,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:23,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470723218] [2021-12-15 08:43:23,594 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 08:43:23,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483706965] [2021-12-15 08:43:23,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483706965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:23,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 08:43:23,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-15 08:43:23,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264560514] [2021-12-15 08:43:23,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:23,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 08:43:23,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:23,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 08:43:23,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:43:23,596 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2021-12-15 08:43:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:23,703 INFO L93 Difference]: Finished difference Result 719 states and 857 transitions. [2021-12-15 08:43:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 08:43:23,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) Word has length 87 [2021-12-15 08:43:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:23,706 INFO L225 Difference]: With dead ends: 719 [2021-12-15 08:43:23,706 INFO L226 Difference]: Without dead ends: 593 [2021-12-15 08:43:23,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-15 08:43:23,707 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 124 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:23,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 41 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:43:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-12-15 08:43:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 379. [2021-12-15 08:43:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.1005291005291005) internal successors, (416), 378 states have internal predecessors, (416), 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) [2021-12-15 08:43:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 416 transitions. [2021-12-15 08:43:23,741 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 416 transitions. Word has length 87 [2021-12-15 08:43:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:23,741 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 416 transitions. [2021-12-15 08:43:23,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2021-12-15 08:43:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 416 transitions. [2021-12-15 08:43:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-15 08:43:23,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:23,744 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:23,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 08:43:23,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:23,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:23,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1409403239, now seen corresponding path program 4 times [2021-12-15 08:43:23,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:23,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125876846] [2021-12-15 08:43:23,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:23,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:24,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 08:43:24,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337180789] [2021-12-15 08:43:24,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:43:24,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:24,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:24,065 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:43:24,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process