./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/sqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-fpi/sqm-if.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 ec5a38bdcfa55d3eade09a482c32f3a3863eaa8e13e2a337e00dc10a9c55f830 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:58:02,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:58:02,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:58:02,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:58:02,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:58:02,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:58:02,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:58:02,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:58:02,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:58:02,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:58:02,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:58:02,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:58:02,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:58:02,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:58:02,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:58:02,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:58:02,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:58:02,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:58:02,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:58:02,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:58:02,834 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:58:02,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:58:02,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:58:02,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:58:02,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:58:02,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:58:02,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:58:02,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:58:02,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:58:02,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:58:02,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:58:02,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:58:02,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:58:02,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:58:02,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:58:02,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:58:02,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:58:02,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:58:02,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:58:02,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:58:02,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:58:02,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:58:02,863 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:58:02,898 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:58:02,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:58:02,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:58:02,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:58:02,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:58:02,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:58:02,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:58:02,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:58:02,902 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:58:02,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:58:02,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:58:02,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:58:02,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:58:02,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:58:02,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:58:02,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:58:02,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:58:02,904 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:58:02,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:58:02,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:58:02,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:58:02,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:58:02,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:58:02,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:58:02,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:58:02,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:58:02,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:58:02,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:58:02,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:58:02,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:58:02,908 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:58:02,909 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:58:02,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:58:02,909 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec5a38bdcfa55d3eade09a482c32f3a3863eaa8e13e2a337e00dc10a9c55f830 [2022-07-22 10:58:03,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:58:03,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:58:03,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:58:03,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:58:03,200 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:58:03,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sqm-if.c [2022-07-22 10:58:03,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daba5b083/81512c2e06944456bc4bc5576e9efb7b/FLAG9cc4d81d9 [2022-07-22 10:58:03,673 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:58:03,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm-if.c [2022-07-22 10:58:03,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daba5b083/81512c2e06944456bc4bc5576e9efb7b/FLAG9cc4d81d9 [2022-07-22 10:58:04,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daba5b083/81512c2e06944456bc4bc5576e9efb7b [2022-07-22 10:58:04,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:58:04,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:58:04,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:58:04,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:58:04,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:58:04,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406bc380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04, skipping insertion in model container [2022-07-22 10:58:04,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:58:04,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:58:04,278 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-fpi/sqm-if.c[589,602] [2022-07-22 10:58:04,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:58:04,326 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:58:04,340 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-fpi/sqm-if.c[589,602] [2022-07-22 10:58:04,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:58:04,373 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:58:04,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04 WrapperNode [2022-07-22 10:58:04,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:58:04,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:58:04,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:58:04,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:58:04,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,421 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-07-22 10:58:04,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:58:04,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:58:04,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:58:04,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:58:04,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:58:04,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:58:04,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:58:04,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:58:04,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (1/1) ... [2022-07-22 10:58:04,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:58:04,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:04,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 10:58:04,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 10:58:04,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:58:04,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:58:04,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:58:04,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 10:58:04,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:58:04,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:58:04,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:58:04,614 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:58:04,616 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:58:04,827 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:58:04,832 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:58:04,832 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 10:58:04,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:58:04 BoogieIcfgContainer [2022-07-22 10:58:04,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:58:04,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:58:04,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:58:04,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:58:04,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:58:04" (1/3) ... [2022-07-22 10:58:04,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e99b4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:58:04, skipping insertion in model container [2022-07-22 10:58:04,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:58:04" (2/3) ... [2022-07-22 10:58:04,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e99b4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:58:04, skipping insertion in model container [2022-07-22 10:58:04,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:58:04" (3/3) ... [2022-07-22 10:58:04,842 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm-if.c [2022-07-22 10:58:04,855 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:58:04,856 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:58:04,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:58:04,907 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1eccecfe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7a666e72 [2022-07-22 10:58:04,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:58:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) [2022-07-22 10:58:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 10:58:04,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:04,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:04,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-07-22 10:58:04,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:04,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229815606] [2022-07-22 10:58:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:04,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:58:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:05,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:05,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229815606] [2022-07-22 10:58:05,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229815606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:58:05,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:58:05,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:58:05,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303983544] [2022-07-22 10:58:05,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:58:05,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:58:05,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:58:05,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:58:05,145 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2022-07-22 10:58:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:05,163 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-07-22 10:58:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:58:05,165 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 [2022-07-22 10:58:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:05,173 INFO L225 Difference]: With dead ends: 42 [2022-07-22 10:58:05,174 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 10:58:05,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:58:05,182 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:05,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:58:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 10:58:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-22 10:58:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-22 10:58:05,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-07-22 10:58:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:05,211 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-22 10:58:05,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2022-07-22 10:58:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-22 10:58:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 10:58:05,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:05,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:05,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:58:05,213 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-07-22 10:58:05,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:05,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794902870] [2022-07-22 10:58:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:05,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:58:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:05,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:05,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794902870] [2022-07-22 10:58:05,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794902870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:58:05,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:58:05,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:58:05,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851407982] [2022-07-22 10:58:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:58:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:58:05,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:58:05,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:58:05,351 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-07-22 10:58:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:05,427 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-07-22 10:58:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:58:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-07-22 10:58:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:05,428 INFO L225 Difference]: With dead ends: 45 [2022-07-22 10:58:05,429 INFO L226 Difference]: Without dead ends: 31 [2022-07-22 10:58:05,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:58:05,430 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:05,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:58:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-22 10:58:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-07-22 10:58:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-22 10:58:05,437 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-22 10:58:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:05,437 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-22 10:58:05,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-07-22 10:58:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-22 10:58:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 10:58:05,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:05,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:05,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 10:58:05,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-07-22 10:58:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:05,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187104807] [2022-07-22 10:58:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:05,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:05,474 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:05,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29650178] [2022-07-22 10:58:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:05,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:05,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:05,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:05,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:58:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:58:05,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 10:58:05,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:05,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:58:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:58:05,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:58:05,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:05,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187104807] [2022-07-22 10:58:05,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29650178] [2022-07-22 10:58:05,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29650178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:58:05,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:58:05,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 10:58:05,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595024901] [2022-07-22 10:58:05,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:58:05,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 10:58:05,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:05,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 10:58:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 10:58:05,728 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:05,812 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-07-22 10:58:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 10:58:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2022-07-22 10:58:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:05,813 INFO L225 Difference]: With dead ends: 40 [2022-07-22 10:58:05,814 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 10:58:05,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:58:05,815 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:05,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:58:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 10:58:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-22 10:58:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2022-07-22 10:58:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-07-22 10:58:05,821 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-07-22 10:58:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:05,821 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-07-22 10:58:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-07-22 10:58:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 10:58:05,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:05,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:05,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 10:58:06,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:06,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:06,045 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-07-22 10:58:06,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:06,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825432917] [2022-07-22 10:58:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:06,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:06,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:06,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741035198] [2022-07-22 10:58:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:06,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:06,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:06,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:06,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:58:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:58:06,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:58:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:06,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:06,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825432917] [2022-07-22 10:58:06,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741035198] [2022-07-22 10:58:06,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741035198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:06,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:06,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-22 10:58:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775482418] [2022-07-22 10:58:06,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:06,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 10:58:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 10:58:06,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:58:06,316 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:06,473 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-07-22 10:58:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 10:58:06,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 21 [2022-07-22 10:58:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:06,475 INFO L225 Difference]: With dead ends: 70 [2022-07-22 10:58:06,476 INFO L226 Difference]: Without dead ends: 43 [2022-07-22 10:58:06,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-07-22 10:58:06,481 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:06,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:58:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-22 10:58:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-07-22 10:58:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-22 10:58:06,501 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-07-22 10:58:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:06,502 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-22 10:58:06,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-22 10:58:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 10:58:06,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:06,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:06,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:06,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 10:58:06,732 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:06,733 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-07-22 10:58:06,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:06,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724102113] [2022-07-22 10:58:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:06,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:06,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:06,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422720439] [2022-07-22 10:58:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:06,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:06,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:06,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:06,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:58:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:58:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 10:58:06,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:06,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:58:06,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:06,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 10:58:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:58:07,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:07,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 10:58:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 10:58:07,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:07,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724102113] [2022-07-22 10:58:07,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:07,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422720439] [2022-07-22 10:58:07,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422720439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:07,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:07,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-22 10:58:07,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976396131] [2022-07-22 10:58:07,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:07,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 10:58:07,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:07,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 10:58:07,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-07-22 10:58:07,297 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:07,452 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2022-07-22 10:58:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:58:07,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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 24 [2022-07-22 10:58:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:07,453 INFO L225 Difference]: With dead ends: 50 [2022-07-22 10:58:07,453 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 10:58:07,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:58:07,454 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:07,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-07-22 10:58:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 10:58:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-07-22 10:58:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-07-22 10:58:07,458 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2022-07-22 10:58:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:07,459 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-07-22 10:58:07,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-07-22 10:58:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 10:58:07,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:07,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:07,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:07,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:07,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:07,661 INFO L85 PathProgramCache]: Analyzing trace with hash -672376363, now seen corresponding path program 2 times [2022-07-22 10:58:07,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:07,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583135268] [2022-07-22 10:58:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:07,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:07,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:07,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475185906] [2022-07-22 10:58:07,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:58:07,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:07,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:07,690 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:07,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:58:07,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:58:07,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:58:07,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:58:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:07,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:07,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:07,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583135268] [2022-07-22 10:58:07,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:07,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475185906] [2022-07-22 10:58:07,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475185906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:07,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:07,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-22 10:58:07,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50586524] [2022-07-22 10:58:07,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:07,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 10:58:07,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 10:58:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 10:58:07,904 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:08,105 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-22 10:58:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:58:08,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 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 27 [2022-07-22 10:58:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:08,110 INFO L225 Difference]: With dead ends: 98 [2022-07-22 10:58:08,110 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 10:58:08,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-22 10:58:08,112 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:08,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 66 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:58:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 10:58:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2022-07-22 10:58:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:08,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-07-22 10:58:08,128 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2022-07-22 10:58:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:08,128 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-07-22 10:58:08,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:08,129 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-07-22 10:58:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 10:58:08,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:08,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:08,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:08,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:08,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:08,344 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-07-22 10:58:08,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:08,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202990983] [2022-07-22 10:58:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:08,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:08,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471994739] [2022-07-22 10:58:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:08,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:08,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:58:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:58:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 10:58:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:08,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:58:08,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:58:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:08,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 10:58:08,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-22 10:58:08,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:08,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-07-22 10:58:08,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 36 [2022-07-22 10:58:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:08,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:09,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:09,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202990983] [2022-07-22 10:58:09,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:09,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471994739] [2022-07-22 10:58:09,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471994739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:09,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:09,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-07-22 10:58:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315280104] [2022-07-22 10:58:09,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:09,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 10:58:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 10:58:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-22 10:58:09,618 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:11,658 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2022-07-22 10:58:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 10:58:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 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 28 [2022-07-22 10:58:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:11,659 INFO L225 Difference]: With dead ends: 140 [2022-07-22 10:58:11,659 INFO L226 Difference]: Without dead ends: 61 [2022-07-22 10:58:11,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 10:58:11,661 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:11,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 133 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 238 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2022-07-22 10:58:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-22 10:58:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2022-07-22 10:58:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-07-22 10:58:11,673 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 28 [2022-07-22 10:58:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:11,673 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-07-22 10:58:11,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:11,674 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-07-22 10:58:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 10:58:11,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:11,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:11,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:11,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:11,896 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1487245307, now seen corresponding path program 3 times [2022-07-22 10:58:11,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:11,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426422139] [2022-07-22 10:58:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:11,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:11,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999446429] [2022-07-22 10:58:11,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:58:11,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:11,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:11,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:11,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:58:12,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 10:58:12,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:58:12,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 10:58:12,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:12,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:58:12,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-07-22 10:58:12,312 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-07-22 10:58:12,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 95 [2022-07-22 10:58:12,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 10:58:12,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-07-22 10:58:12,426 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-07-22 10:58:12,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 95 [2022-07-22 10:58:12,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 10:58:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:58:12,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:13,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-07-22 10:58:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:58:13,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:13,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426422139] [2022-07-22 10:58:13,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:13,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999446429] [2022-07-22 10:58:13,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999446429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:13,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:13,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-07-22 10:58:13,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265669175] [2022-07-22 10:58:13,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:13,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 10:58:13,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 10:58:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-07-22 10:58:13,097 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:14,205 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2022-07-22 10:58:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 10:58:14,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 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 30 [2022-07-22 10:58:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:14,206 INFO L225 Difference]: With dead ends: 155 [2022-07-22 10:58:14,206 INFO L226 Difference]: Without dead ends: 133 [2022-07-22 10:58:14,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=507, Invalid=1215, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 10:58:14,208 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 236 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:14,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 145 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 291 Invalid, 0 Unknown, 225 Unchecked, 0.3s Time] [2022-07-22 10:58:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-22 10:58:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 71. [2022-07-22 10:58:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-07-22 10:58:14,223 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 30 [2022-07-22 10:58:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:14,223 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-07-22 10:58:14,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-07-22 10:58:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 10:58:14,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:14,224 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:14,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 10:58:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:14,431 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash 939270440, now seen corresponding path program 2 times [2022-07-22 10:58:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:14,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674652096] [2022-07-22 10:58:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:14,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:14,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025301259] [2022-07-22 10:58:14,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:58:14,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:14,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:14,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:14,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 10:58:14,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:58:14,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:58:14,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:58:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 10:58:14,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 10:58:14,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:14,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674652096] [2022-07-22 10:58:14,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:14,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025301259] [2022-07-22 10:58:14,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025301259] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:14,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:14,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-22 10:58:14,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804870130] [2022-07-22 10:58:14,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:14,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 10:58:14,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:14,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 10:58:14,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-22 10:58:14,665 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:14,854 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2022-07-22 10:58:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 10:58:14,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 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 31 [2022-07-22 10:58:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:14,855 INFO L225 Difference]: With dead ends: 128 [2022-07-22 10:58:14,855 INFO L226 Difference]: Without dead ends: 64 [2022-07-22 10:58:14,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:58:14,856 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:14,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 58 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:58:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-22 10:58:14,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-07-22 10:58:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-07-22 10:58:14,862 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 31 [2022-07-22 10:58:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:14,863 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-07-22 10:58:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-07-22 10:58:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 10:58:14,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:14,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:14,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:15,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:15,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:15,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1646708229, now seen corresponding path program 3 times [2022-07-22 10:58:15,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:15,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442972781] [2022-07-22 10:58:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:15,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:15,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:15,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049107568] [2022-07-22 10:58:15,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:58:15,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:15,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:15,109 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:15,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 10:58:15,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 10:58:15,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:58:15,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 10:58:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:15,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:58:15,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:58:15,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-07-22 10:58:15,464 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-07-22 10:58:15,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 95 [2022-07-22 10:58:15,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:15,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 12 [2022-07-22 10:58:15,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 83 [2022-07-22 10:58:15,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:15,642 INFO L356 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2022-07-22 10:58:15,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 124 [2022-07-22 10:58:15,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:15,706 INFO L356 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2022-07-22 10:58:15,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 44 [2022-07-22 10:58:15,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-07-22 10:58:16,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 152 [2022-07-22 10:58:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:58:16,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 196 [2022-07-22 10:58:16,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 58 [2022-07-22 10:58:16,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 85 [2022-07-22 10:58:16,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:16,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 135 [2022-07-22 10:58:16,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 31 [2022-07-22 10:58:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:16,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:18,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442972781] [2022-07-22 10:58:18,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049107568] [2022-07-22 10:58:18,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049107568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:18,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:18,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 39 [2022-07-22 10:58:18,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796122321] [2022-07-22 10:58:18,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:18,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 10:58:18,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:18,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 10:58:18,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 10:58:18,744 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:21,148 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-07-22 10:58:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 10:58:21,149 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 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 34 [2022-07-22 10:58:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:21,150 INFO L225 Difference]: With dead ends: 106 [2022-07-22 10:58:21,150 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 10:58:21,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=662, Invalid=3244, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 10:58:21,152 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:21,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 210 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 194 Invalid, 0 Unknown, 311 Unchecked, 0.4s Time] [2022-07-22 10:58:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 10:58:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2022-07-22 10:58:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2022-07-22 10:58:21,162 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 34 [2022-07-22 10:58:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:21,162 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2022-07-22 10:58:21,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2022-07-22 10:58:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 10:58:21,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:21,164 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:21,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:21,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 10:58:21,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash 180276683, now seen corresponding path program 4 times [2022-07-22 10:58:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:21,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155400364] [2022-07-22 10:58:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:21,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:21,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816637659] [2022-07-22 10:58:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:58:21,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:21,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:21,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:21,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 10:58:21,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:58:21,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:58:21,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:58:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 10:58:21,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 10:58:21,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:21,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155400364] [2022-07-22 10:58:21,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:21,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816637659] [2022-07-22 10:58:21,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816637659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:21,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:21,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-22 10:58:21,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43687858] [2022-07-22 10:58:21,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:21,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 10:58:21,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:21,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 10:58:21,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:58:21,620 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:21,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:21,941 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2022-07-22 10:58:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 10:58:21,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 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 37 [2022-07-22 10:58:21,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:21,943 INFO L225 Difference]: With dead ends: 121 [2022-07-22 10:58:21,943 INFO L226 Difference]: Without dead ends: 112 [2022-07-22 10:58:21,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-07-22 10:58:21,944 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 92 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:21,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 172 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:58:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-22 10:58:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2022-07-22 10:58:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-07-22 10:58:21,953 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 37 [2022-07-22 10:58:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:21,954 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-07-22 10:58:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-07-22 10:58:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 10:58:21,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:21,955 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:21,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:22,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:22,171 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:22,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 5 times [2022-07-22 10:58:22,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:22,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343173595] [2022-07-22 10:58:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:22,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:22,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:22,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301582224] [2022-07-22 10:58:22,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:58:22,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:22,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:22,192 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:22,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 10:58:22,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 10:58:22,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:58:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-22 10:58:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:22,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:58:22,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:58:22,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-22 10:58:22,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:58:22,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-22 10:58:22,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 35 [2022-07-22 10:58:22,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-07-22 10:58:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:22,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-07-22 10:58:23,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 146 [2022-07-22 10:58:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:23,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:58:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:23,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:23,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:23,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 199 [2022-07-22 10:58:23,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:23,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:23,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 68 [2022-07-22 10:58:23,690 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-07-22 10:58:23,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 98 treesize of output 50 [2022-07-22 10:58:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:23,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:36,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:36,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343173595] [2022-07-22 10:58:36,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:36,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301582224] [2022-07-22 10:58:36,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301582224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:36,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:36,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2022-07-22 10:58:36,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331475676] [2022-07-22 10:58:36,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:36,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 10:58:36,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 10:58:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 10:58:36,484 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:39,217 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-07-22 10:58:39,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 10:58:39,217 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 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 38 [2022-07-22 10:58:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:39,218 INFO L225 Difference]: With dead ends: 107 [2022-07-22 10:58:39,218 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 10:58:39,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 10:58:39,219 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:39,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 201 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 268 Invalid, 0 Unknown, 281 Unchecked, 0.4s Time] [2022-07-22 10:58:39,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 10:58:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2022-07-22 10:58:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 73 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2022-07-22 10:58:39,242 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 38 [2022-07-22 10:58:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:39,242 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2022-07-22 10:58:39,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2022-07-22 10:58:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 10:58:39,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:39,248 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:39,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:39,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 10:58:39,455 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:39,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:39,455 INFO L85 PathProgramCache]: Analyzing trace with hash 225973234, now seen corresponding path program 4 times [2022-07-22 10:58:39,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:39,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473491799] [2022-07-22 10:58:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:39,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:39,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:39,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364699937] [2022-07-22 10:58:39,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:58:39,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:39,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:39,478 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:39,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 10:58:39,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:58:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:58:39,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:58:39,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:58:39,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:58:39,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:39,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473491799] [2022-07-22 10:58:39,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364699937] [2022-07-22 10:58:39,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364699937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:39,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:39,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-22 10:58:39,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837352021] [2022-07-22 10:58:39,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:39,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 10:58:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:39,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 10:58:39,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:58:39,682 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:39,901 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2022-07-22 10:58:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 10:58:39,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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 39 [2022-07-22 10:58:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:39,902 INFO L225 Difference]: With dead ends: 126 [2022-07-22 10:58:39,902 INFO L226 Difference]: Without dead ends: 74 [2022-07-22 10:58:39,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:58:39,903 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 92 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:39,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 88 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:58:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-22 10:58:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2022-07-22 10:58:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-07-22 10:58:39,911 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2022-07-22 10:58:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:39,911 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-07-22 10:58:39,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-07-22 10:58:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 10:58:39,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:39,912 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:39,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:40,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 10:58:40,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:40,124 INFO L85 PathProgramCache]: Analyzing trace with hash 173090424, now seen corresponding path program 6 times [2022-07-22 10:58:40,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:40,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817758714] [2022-07-22 10:58:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:40,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:40,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:40,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410521921] [2022-07-22 10:58:40,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:58:40,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:40,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:40,148 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:40,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 10:58:40,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-22 10:58:40,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:58:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-22 10:58:40,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:40,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:58:40,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:58:40,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-22 10:58:40,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:58:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:40,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:40,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-22 10:58:40,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:40,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:40,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 37 [2022-07-22 10:58:41,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 71 [2022-07-22 10:58:41,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 145 [2022-07-22 10:58:41,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 71 [2022-07-22 10:58:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 145 [2022-07-22 10:58:41,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-22 10:58:41,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-07-22 10:58:41,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 134 [2022-07-22 10:58:41,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:58:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 196 [2022-07-22 10:58:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 117 [2022-07-22 10:58:41,561 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-22 10:58:41,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 79 [2022-07-22 10:58:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 124 [2022-07-22 10:58:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 54 [2022-07-22 10:58:41,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:58:41,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:58:41,693 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 10:58:41,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 55 [2022-07-22 10:58:41,936 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-22 10:58:41,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 36 [2022-07-22 10:58:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:41,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:50,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 714 treesize of output 710 [2022-07-22 10:58:50,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:58:50,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 256 [2022-07-22 10:58:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:50,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:50,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817758714] [2022-07-22 10:58:50,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410521921] [2022-07-22 10:58:50,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410521921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:50,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:50,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 42 [2022-07-22 10:58:50,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422608370] [2022-07-22 10:58:50,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:50,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 10:58:50,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 10:58:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 10:58:50,337 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:58:55,961 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2022-07-22 10:58:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 10:58:55,962 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 42 states have internal predecessors, (74), 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 40 [2022-07-22 10:58:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:58:55,962 INFO L225 Difference]: With dead ends: 123 [2022-07-22 10:58:55,962 INFO L226 Difference]: Without dead ends: 121 [2022-07-22 10:58:55,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 10:58:55,964 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:58:55,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 113 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 206 Invalid, 0 Unknown, 288 Unchecked, 0.2s Time] [2022-07-22 10:58:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-22 10:58:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2022-07-22 10:58:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 104 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2022-07-22 10:58:55,981 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 40 [2022-07-22 10:58:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:58:55,981 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2022-07-22 10:58:55,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:58:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2022-07-22 10:58:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 10:58:55,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:58:55,982 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:58:55,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 10:58:56,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 10:58:56,190 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:58:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:58:56,190 INFO L85 PathProgramCache]: Analyzing trace with hash 587620898, now seen corresponding path program 5 times [2022-07-22 10:58:56,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:58:56,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841555562] [2022-07-22 10:58:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:58:56,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:58:56,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:58:56,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768887496] [2022-07-22 10:58:56,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:58:56,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:58:56,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:58:56,227 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:58:56,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 10:58:59,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-22 10:58:59,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:58:59,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 10:58:59,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:58:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:59,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:58:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 49 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:58:59,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:58:59,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841555562] [2022-07-22 10:58:59,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 10:58:59,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768887496] [2022-07-22 10:58:59,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768887496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:58:59,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:58:59,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2022-07-22 10:58:59,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538494894] [2022-07-22 10:58:59,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:58:59,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 10:58:59,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:58:59,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 10:58:59,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-07-22 10:58:59,719 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:59:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:59:00,125 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2022-07-22 10:59:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 10:59:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 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 42 [2022-07-22 10:59:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:59:00,127 INFO L225 Difference]: With dead ends: 231 [2022-07-22 10:59:00,127 INFO L226 Difference]: Without dead ends: 199 [2022-07-22 10:59:00,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 10:59:00,128 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 378 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:59:00,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 179 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:59:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-22 10:59:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 134. [2022-07-22 10:59:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.112781954887218) internal successors, (148), 133 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:59:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2022-07-22 10:59:00,159 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 42 [2022-07-22 10:59:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:59:00,160 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2022-07-22 10:59:00,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:59:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2022-07-22 10:59:00,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 10:59:00,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:59:00,160 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:59:00,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 10:59:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 10:59:00,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:59:00,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:59:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1596358930, now seen corresponding path program 7 times [2022-07-22 10:59:00,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:59:00,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284081141] [2022-07-22 10:59:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:59:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:59:00,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 10:59:00,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479550053] [2022-07-22 10:59:00,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:59:00,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:59:00,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:59:00,389 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:59:00,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 10:59:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:59:00,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 10:59:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:59:00,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 10:59:00,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 10:59:00,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-07-22 10:59:00,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:59:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-07-22 10:59:00,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 47 [2022-07-22 10:59:00,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 57 [2022-07-22 10:59:00,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 117 [2022-07-22 10:59:00,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 30 [2022-07-22 10:59:00,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:00,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-22 10:59:01,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-07-22 10:59:01,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 139 [2022-07-22 10:59:01,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:59:01,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 199 [2022-07-22 10:59:01,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 103 [2022-07-22 10:59:01,323 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-22 10:59:01,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 148 [2022-07-22 10:59:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:59:01,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 216 [2022-07-22 10:59:01,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 119 [2022-07-22 10:59:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:59:01,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:59:01,512 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-22 10:59:01,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 70 [2022-07-22 10:59:01,816 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-22 10:59:01,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 42 [2022-07-22 10:59:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:59:01,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:59:36,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29286710 treesize of output 29109558