./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/ifeqn5.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 2e5b1d71ba93ce7431f315c72529ea116ea643f5eb9195d392455a202e45b249 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 10:01:43,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:01:43,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:01:43,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:01:43,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:01:43,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:01:43,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:01:43,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:01:43,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:01:43,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:01:43,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:01:43,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:01:43,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:01:43,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:01:43,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:01:43,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:01:43,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:01:43,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:01:43,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:01:43,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:01:43,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:01:43,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:01:43,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:01:43,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:01:43,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:01:43,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:01:43,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:01:43,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:01:43,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:01:43,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:01:43,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:01:43,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:01:43,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:01:43,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:01:43,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:01:43,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:01:43,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:01:43,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:01:43,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:01:43,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:01:43,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:01:43,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:01:43,898 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:01:43,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:01:43,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:01:43,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:01:43,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:01:43,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:01:43,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:01:43,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:01:43,902 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:01:43,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:01:43,902 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:01:43,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:01:43,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:01:43,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:01:43,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:01:43,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:01:43,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:01:43,903 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:01:43,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:01:43,904 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:01:43,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:01:43,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:01:43,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:01:43,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:01:43,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:01:43,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:01:43,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:01:43,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:01:43,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:01:43,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:01:43,905 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:01:43,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:01:43,906 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:01:43,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:01:43,906 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:01:43,906 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e5b1d71ba93ce7431f315c72529ea116ea643f5eb9195d392455a202e45b249 [2023-02-15 10:01:44,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:01:44,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:01:44,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:01:44,144 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:01:44,144 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:01:44,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn5.c [2023-02-15 10:01:45,148 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:01:45,334 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:01:45,335 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn5.c [2023-02-15 10:01:45,340 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2c03166/494b095d6b294cd4a2cd4e03a2ca4546/FLAG1b3ff9925 [2023-02-15 10:01:45,357 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2c03166/494b095d6b294cd4a2cd4e03a2ca4546 [2023-02-15 10:01:45,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:01:45,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:01:45,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:01:45,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:01:45,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:01:45,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e25de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45, skipping insertion in model container [2023-02-15 10:01:45,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:01:45,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:01:45,471 WARN L237 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/ifeqn5.c[589,602] [2023-02-15 10:01:45,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:01:45,488 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:01:45,495 WARN L237 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/ifeqn5.c[589,602] [2023-02-15 10:01:45,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:01:45,520 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:01:45,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45 WrapperNode [2023-02-15 10:01:45,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:01:45,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:01:45,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:01:45,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:01:45,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,549 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-02-15 10:01:45,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:01:45,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:01:45,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:01:45,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:01:45,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,585 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:01:45,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:01:45,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:01:45,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:01:45,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (1/1) ... [2023-02-15 10:01:45,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:01:45,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:45,615 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) [2023-02-15 10:01:45,639 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 [2023-02-15 10:01:45,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:01:45,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:01:45,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 10:01:45,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:01:45,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:01:45,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:01:45,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 10:01:45,739 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:01:45,742 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:01:45,928 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:01:45,932 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:01:45,948 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 10:01:45,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:01:45 BoogieIcfgContainer [2023-02-15 10:01:45,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:01:45,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:01:45,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:01:45,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:01:45,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:01:45" (1/3) ... [2023-02-15 10:01:45,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568f631d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:01:45, skipping insertion in model container [2023-02-15 10:01:45,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:01:45" (2/3) ... [2023-02-15 10:01:45,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568f631d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:01:45, skipping insertion in model container [2023-02-15 10:01:45,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:01:45" (3/3) ... [2023-02-15 10:01:45,956 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn5.c [2023-02-15 10:01:45,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:01:45,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:01:46,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:01:46,070 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35233c36, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:01:46,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:01:46,074 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) [2023-02-15 10:01:46,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 10:01:46,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:46,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:46,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:46,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:46,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2023-02-15 10:01:46,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:46,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700691343] [2023-02-15 10:01:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:46,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:46,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:46,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700691343] [2023-02-15 10:01:46,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 10:01:46,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836065826] [2023-02-15 10:01:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:46,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:46,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:46,201 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) [2023-02-15 10:01:46,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 10:01:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:46,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 10:01:46,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:46,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:01:46,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836065826] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:01:46,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:01:46,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 10:01:46,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622307810] [2023-02-15 10:01:46,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:01:46,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 10:01:46,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:46,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 10:01:46,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:01:46,304 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) [2023-02-15 10:01:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:46,315 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-02-15 10:01:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 10:01:46,316 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 [2023-02-15 10:01:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:46,321 INFO L225 Difference]: With dead ends: 42 [2023-02-15 10:01:46,321 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 10:01:46,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 10:01:46,325 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 [2023-02-15 10:01:46,326 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] [2023-02-15 10:01:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 10:01:46,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 10:01:46,344 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) [2023-02-15 10:01:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-15 10:01:46,345 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-15 10:01:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:46,345 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-15 10:01:46,345 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) [2023-02-15 10:01:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-15 10:01:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 10:01:46,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:46,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:46,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 10:01:46,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 10:01:46,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2023-02-15 10:01:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:46,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535421864] [2023-02-15 10:01:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:46,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535421864] [2023-02-15 10:01:46,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 10:01:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284619577] [2023-02-15 10:01:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:46,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:46,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:46,617 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) [2023-02-15 10:01:46,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 10:01:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 10:01:46,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:46,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:01:46,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284619577] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:01:46,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:01:46,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 10:01:46,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289106674] [2023-02-15 10:01:46,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:01:46,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 10:01:46,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 10:01:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:01:46,746 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) [2023-02-15 10:01:46,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:46,815 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-15 10:01:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 10:01:46,816 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 [2023-02-15 10:01:46,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:46,817 INFO L225 Difference]: With dead ends: 42 [2023-02-15 10:01:46,817 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 10:01:46,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 10:01:46,818 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:46,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:01:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 10:01:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-02-15 10:01:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2023-02-15 10:01:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-15 10:01:46,837 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-02-15 10:01:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:46,838 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-15 10:01:46,838 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) [2023-02-15 10:01:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-15 10:01:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 10:01:46,839 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:46,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:46,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:47,043 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,SelfDestructingSolverStorable1 [2023-02-15 10:01:47,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2023-02-15 10:01:47,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:47,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546488340] [2023-02-15 10:01:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:47,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:47,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:47,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278026813] [2023-02-15 10:01:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:47,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:47,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:47,069 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) [2023-02-15 10:01:47,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 10:01:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 10:01:47,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:47,189 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:47,238 INFO L350 Elim1Store]: Elim1 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 20 [2023-02-15 10:01:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 10:01:47,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:01:47,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:47,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546488340] [2023-02-15 10:01:47,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:47,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278026813] [2023-02-15 10:01:47,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278026813] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:01:47,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:01:47,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:01:47,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955698323] [2023-02-15 10:01:47,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:01:47,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:01:47,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:01:47,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:01:47,250 INFO L87 Difference]: Start difference. First operand 21 states and 25 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) [2023-02-15 10:01:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:47,330 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-02-15 10:01:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 10:01:47,330 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 [2023-02-15 10:01:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:47,331 INFO L225 Difference]: With dead ends: 38 [2023-02-15 10:01:47,331 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 10:01:47,331 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 [2023-02-15 10:01:47,332 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:47,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:01:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 10:01:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2023-02-15 10:01:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2023-02-15 10:01:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-15 10:01:47,337 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2023-02-15 10:01:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:47,337 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-15 10:01:47,337 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) [2023-02-15 10:01:47,337 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-15 10:01:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 10:01:47,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:47,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:47,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:47,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:47,543 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2023-02-15 10:01:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478136733] [2023-02-15 10:01:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:47,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:47,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:47,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478136733] [2023-02-15 10:01:47,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 10:01:47,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100179247] [2023-02-15 10:01:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:47,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:47,587 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) [2023-02-15 10:01:47,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 10:01:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 10:01:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 10:01:47,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 10:01:47,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100179247] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:01:47,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:01:47,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 10:01:47,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484685233] [2023-02-15 10:01:47,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:01:47,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 10:01:47,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 10:01:47,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:01:47,649 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2023-02-15 10:01:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:47,692 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-15 10:01:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 10:01:47,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2023-02-15 10:01:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:47,697 INFO L225 Difference]: With dead ends: 55 [2023-02-15 10:01:47,700 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 10:01:47,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 10:01:47,703 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:47,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 10:01:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 10:01:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-02-15 10:01:47,715 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) [2023-02-15 10:01:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-15 10:01:47,716 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2023-02-15 10:01:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:47,719 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-15 10:01:47,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2023-02-15 10:01:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-15 10:01:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 10:01:47,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:47,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:47,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:47,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:47,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2023-02-15 10:01:47,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:47,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057691668] [2023-02-15 10:01:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:47,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:47,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:47,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115780061] [2023-02-15 10:01:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:47,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:47,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:47,994 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) [2023-02-15 10:01:47,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 10:01:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:48,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 10:01:48,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:48,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:01:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:48,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:48,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057691668] [2023-02-15 10:01:48,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:48,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115780061] [2023-02-15 10:01:48,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115780061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:01:48,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:01:48,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 10:01:48,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224363982] [2023-02-15 10:01:48,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:01:48,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:01:48,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:48,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:01:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:01:48,178 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) [2023-02-15 10:01:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:48,292 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-02-15 10:01:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:01:48,292 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 [2023-02-15 10:01:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:48,293 INFO L225 Difference]: With dead ends: 70 [2023-02-15 10:01:48,293 INFO L226 Difference]: Without dead ends: 43 [2023-02-15 10:01:48,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:01:48,294 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:48,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:01:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-15 10:01:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2023-02-15 10:01:48,297 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) [2023-02-15 10:01:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-02-15 10:01:48,298 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2023-02-15 10:01:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:48,298 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-02-15 10:01:48,298 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) [2023-02-15 10:01:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-02-15 10:01:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 10:01:48,299 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:48,299 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] [2023-02-15 10:01:48,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:48,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:48,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2023-02-15 10:01:48,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:48,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088859895] [2023-02-15 10:01:48,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:48,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:48,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:48,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032251053] [2023-02-15 10:01:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:48,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:48,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:48,523 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) [2023-02-15 10:01:48,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 10:01:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:48,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 10:01:48,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:48,631 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:48,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:48,667 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:48,693 INFO L350 Elim1Store]: Elim1 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 20 [2023-02-15 10:01:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:48,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:01:48,849 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:01:48,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088859895] [2023-02-15 10:01:48,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032251053] [2023-02-15 10:01:48,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032251053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:01:48,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:01:48,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-02-15 10:01:48,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318524630] [2023-02-15 10:01:48,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:01:48,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 10:01:48,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 10:01:48,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:01:48,870 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:49,263 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2023-02-15 10:01:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 10:01:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-15 10:01:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:49,264 INFO L225 Difference]: With dead ends: 112 [2023-02-15 10:01:49,264 INFO L226 Difference]: Without dead ends: 92 [2023-02-15 10:01:49,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-02-15 10:01:49,265 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 179 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:49,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 85 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:01:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-15 10:01:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2023-02-15 10:01:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 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) [2023-02-15 10:01:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-15 10:01:49,271 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2023-02-15 10:01:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:49,271 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-15 10:01:49,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 10:01:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-15 10:01:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 10:01:49,272 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:49,272 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] [2023-02-15 10:01:49,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 10:01:49,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:49,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:49,478 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2023-02-15 10:01:49,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:49,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103520354] [2023-02-15 10:01:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:49,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:49,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:49,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789892890] [2023-02-15 10:01:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:49,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:49,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:49,494 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) [2023-02-15 10:01:49,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 10:01:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:01:49,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 10:01:49,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:49,578 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:49,606 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:49,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:49,650 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:49,702 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:49,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:49,755 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:01:49,755 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 38 treesize of output 32 [2023-02-15 10:01:49,887 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:01:49,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2023-02-15 10:01:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:49,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:01:50,220 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse5 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (* .cse5 8)) (.cse3 (<= .cse5 2147483647))) (and (or (forall ((v_ArrVal_140 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_140)))) (store .cse0 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 10)) .cse3) (or (forall ((v_ArrVal_140 Int)) (= (select (select (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_140)))) (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 10)) (not .cse3))))) (= |c_ULTIMATE.start_main_~i~0#1| 0)) is different from false [2023-02-15 10:01:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-02-15 10:01:50,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:50,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103520354] [2023-02-15 10:01:50,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:50,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789892890] [2023-02-15 10:01:50,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789892890] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:01:50,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:01:50,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-02-15 10:01:50,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695518026] [2023-02-15 10:01:50,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:01:50,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 10:01:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 10:01:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=382, Unknown=1, NotChecked=40, Total=506 [2023-02-15 10:01:50,420 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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) [2023-02-15 10:01:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:53,834 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2023-02-15 10:01:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 10:01:53,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 [2023-02-15 10:01:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:53,836 INFO L225 Difference]: With dead ends: 149 [2023-02-15 10:01:53,836 INFO L226 Difference]: Without dead ends: 147 [2023-02-15 10:01:53,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=571, Invalid=1882, Unknown=1, NotChecked=96, Total=2550 [2023-02-15 10:01:53,837 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 300 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:53,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 188 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 362 Invalid, 0 Unknown, 84 Unchecked, 0.6s Time] [2023-02-15 10:01:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-15 10:01:53,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 74. [2023-02-15 10:01:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 73 states have internal predecessors, (92), 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) [2023-02-15 10:01:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2023-02-15 10:01:53,846 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 28 [2023-02-15 10:01:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:53,846 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2023-02-15 10:01:53,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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) [2023-02-15 10:01:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2023-02-15 10:01:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 10:01:53,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:53,847 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:53,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:54,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:54,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:54,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:54,053 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2023-02-15 10:01:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:54,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695680680] [2023-02-15 10:01:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:54,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:54,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531597144] [2023-02-15 10:01:54,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:01:54,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:54,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:54,075 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) [2023-02-15 10:01:54,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 10:01:54,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:01:54,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:01:54,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 10:01:54,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:01:54,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:01:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 10:01:54,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695680680] [2023-02-15 10:01:54,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531597144] [2023-02-15 10:01:54,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531597144] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:01:54,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:01:54,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 10:01:54,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59925999] [2023-02-15 10:01:54,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:01:54,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 10:01:54,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 10:01:54,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:01:54,286 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2023-02-15 10:01:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:54,425 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2023-02-15 10:01:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 10:01:54,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 32 [2023-02-15 10:01:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:54,427 INFO L225 Difference]: With dead ends: 178 [2023-02-15 10:01:54,427 INFO L226 Difference]: Without dead ends: 116 [2023-02-15 10:01:54,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-15 10:01:54,429 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:54,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 55 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:01:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-15 10:01:54,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2023-02-15 10:01:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 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) [2023-02-15 10:01:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2023-02-15 10:01:54,446 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 32 [2023-02-15 10:01:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:54,447 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2023-02-15 10:01:54,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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) [2023-02-15 10:01:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2023-02-15 10:01:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 10:01:54,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:54,452 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:54,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:54,661 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,SelfDestructingSolverStorable7 [2023-02-15 10:01:54,661 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:54,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2023-02-15 10:01:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:54,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091241954] [2023-02-15 10:01:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:54,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:54,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:54,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090731149] [2023-02-15 10:01:54,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 10:01:54,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:54,690 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) [2023-02-15 10:01:54,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 10:01:54,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 10:01:54,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:01:54,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 10:01:54,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 10:01:54,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:01:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 10:01:54,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:54,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091241954] [2023-02-15 10:01:54,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:54,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090731149] [2023-02-15 10:01:54,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090731149] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:01:54,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:01:54,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-15 10:01:54,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383927873] [2023-02-15 10:01:54,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:01:54,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 10:01:54,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:54,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 10:01:54,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:01:54,912 INFO L87 Difference]: Start difference. First operand 91 states and 108 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) [2023-02-15 10:01:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:55,117 INFO L93 Difference]: Finished difference Result 217 states and 248 transitions. [2023-02-15 10:01:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 10:01:55,118 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 36 [2023-02-15 10:01:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:55,119 INFO L225 Difference]: With dead ends: 217 [2023-02-15 10:01:55,119 INFO L226 Difference]: Without dead ends: 164 [2023-02-15 10:01:55,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-15 10:01:55,119 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 131 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:55,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 98 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:01:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-15 10:01:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2023-02-15 10:01:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.180327868852459) internal successors, (144), 122 states have internal predecessors, (144), 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) [2023-02-15 10:01:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2023-02-15 10:01:55,137 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 36 [2023-02-15 10:01:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:55,138 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2023-02-15 10:01:55,138 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) [2023-02-15 10:01:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2023-02-15 10:01:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 10:01:55,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:55,140 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:01:55,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:55,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:55,345 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2023-02-15 10:01:55,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:55,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400237890] [2023-02-15 10:01:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:55,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:55,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:55,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707525318] [2023-02-15 10:01:55,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:01:55,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:55,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:55,385 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) [2023-02-15 10:01:55,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 10:01:55,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 10:01:55,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:01:55,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 10:01:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:01:55,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:01:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 10:01:55,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:01:55,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400237890] [2023-02-15 10:01:55,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:01:55,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707525318] [2023-02-15 10:01:55,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707525318] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:01:55,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:01:55,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-02-15 10:01:55,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677245757] [2023-02-15 10:01:55,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:01:55,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 10:01:55,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:01:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 10:01:55,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-02-15 10:01:55,750 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2023-02-15 10:01:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:01:56,194 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2023-02-15 10:01:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 10:01:56,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 [2023-02-15 10:01:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:01:56,196 INFO L225 Difference]: With dead ends: 158 [2023-02-15 10:01:56,196 INFO L226 Difference]: Without dead ends: 149 [2023-02-15 10:01:56,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 10:01:56,197 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 137 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:01:56,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 93 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 10:01:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-15 10:01:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2023-02-15 10:01:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 122 states have internal predecessors, (142), 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) [2023-02-15 10:01:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2023-02-15 10:01:56,217 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 37 [2023-02-15 10:01:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:01:56,223 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2023-02-15 10:01:56,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2023-02-15 10:01:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2023-02-15 10:01:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 10:01:56,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:01:56,224 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] [2023-02-15 10:01:56,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 10:01:56,428 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,SelfDestructingSolverStorable9 [2023-02-15 10:01:56,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:01:56,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:01:56,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2023-02-15 10:01:56,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:01:56,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399486623] [2023-02-15 10:01:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:01:56,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:01:56,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:01:56,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313741085] [2023-02-15 10:01:56,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 10:01:56,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:01:56,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:01:56,445 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) [2023-02-15 10:01:56,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 10:01:56,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 10:01:56,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:01:56,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-15 10:01:56,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:01:56,620 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:56,634 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:56,681 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:56,685 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:01:56,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,689 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:56,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,734 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:56,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,789 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:01:56,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,866 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 32 [2023-02-15 10:01:56,942 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:01:56,943 INFO L350 Elim1Store]: Elim1 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 157 treesize of output 141 [2023-02-15 10:01:56,952 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:01:56,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:56,956 INFO L350 Elim1Store]: Elim1 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 123 treesize of output 197 [2023-02-15 10:01:56,971 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 10:01:57,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,061 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:01:57,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:01:57,063 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-02-15 10:01:57,063 INFO L350 Elim1Store]: Elim1 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 68 treesize of output 58 [2023-02-15 10:01:57,332 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-15 10:01:57,332 INFO L350 Elim1Store]: Elim1 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 83 treesize of output 43 [2023-02-15 10:01:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:01:57,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:02:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:02:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:02:06,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399486623] [2023-02-15 10:02:06,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:02:06,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313741085] [2023-02-15 10:02:06,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313741085] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:02:06,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:02:06,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2023-02-15 10:02:06,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741408854] [2023-02-15 10:02:06,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:02:06,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 10:02:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:02:06,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 10:02:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 10:02:06,120 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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) [2023-02-15 10:02:16,866 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse15 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse16 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse13 (* .cse15 8)) (.cse45 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse41 (* 8 .cse45)) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse24 (+ .cse13 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse31 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse50 (+ .cse13 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse51 (* (mod .cse16 4294967296) 8))) (let ((.cse14 (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse23 (+ .cse51 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse36 (select .cse31 .cse50)) (.cse7 (select .cse5 .cse24)) (.cse25 (select .cse31 (+ .cse41 |c_ULTIMATE.start_main_~b~0#1.offset|))) (.cse26 (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse41)))) (let ((.cse20 (store .cse31 .cse50 (+ .cse25 .cse26))) (.cse27 (store .cse31 .cse23 (+ .cse36 .cse7))) (.cse22 (select .cse5 .cse4)) (.cse3 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse35 (+ .cse14 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse6 (+ .cse51 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse21 (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|))) (and (or (let ((.cse9 (<= .cse15 2147483647)) (.cse8 (+ .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (forall ((v_ArrVal_291 Int)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse5 .cse6 (+ 10 .cse7)) .cse8 v_ArrVal_291)))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse2 .cse3 (+ .cse0 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))) 30)) (not .cse9)) (or .cse9 (forall ((v_ArrVal_291 Int)) (= 30 (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse5 .cse6 (+ (select .cse5 (+ .cse13 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) 10)) .cse8 v_ArrVal_291)))) (let ((.cse11 (store (select .cse10 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse12 (select (select (store .cse10 |c_ULTIMATE.start_main_~b~0#1.base| .cse11) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse11 .cse3 (+ .cse12 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) .cse12))))))))) (= .cse16 0)) (forall ((v_ArrVal_291 Int)) (= (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse5 .cse6 v_ArrVal_291)))) (let ((.cse19 (store (select .cse18 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse17 (select (select (store .cse18 |c_ULTIMATE.start_main_~b~0#1.base| .cse19) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse17 (select (select (store .cse18 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse19 .cse3 (+ .cse17 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))) 30)) (= (select .cse20 .cse21) 31) (= .cse22 (+ 10 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= 31 (select (store .cse20 .cse23 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse20) |c_ULTIMATE.start_main_~a~0#1.base|) .cse24) .cse25 .cse26)) .cse21)) (= (select .cse27 .cse21) 31) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (let ((.cse30 (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse29 (select .cse31 .cse3)) (.cse28 (select .cse30 0))) (and (= (+ .cse28 1) .cse29) (= .cse28 10) (= (+ .cse28 10) (select .cse30 8)) (= (select .cse31 .cse21) (+ .cse29 .cse28 10)))))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (forall ((v_ArrVal_291 Int)) (= (let ((.cse33 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse5 .cse24 v_ArrVal_291)))) (let ((.cse34 (store (select .cse33 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse32 (select (select (store .cse33 |c_ULTIMATE.start_main_~b~0#1.base| .cse34) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse32 (select (select (store .cse33 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse34 .cse3 (+ .cse32 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))) 30)) (= (select .cse31 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= 31 (select (store .cse27 .cse35 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse27) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse36 .cse7)) .cse21)) (= .cse22 20) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (or (let ((.cse37 (<= .cse45 2147483647))) (and (or .cse37 (forall ((v_ArrVal_291 Int)) (= (let ((.cse39 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse5 .cse24 (+ (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse41)) 10)) .cse6 v_ArrVal_291)))) (let ((.cse40 (store (select .cse39 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse38 (select (select (store .cse39 |c_ULTIMATE.start_main_~b~0#1.base| .cse40) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse38 (select (select (store .cse39 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse40 .cse3 (+ .cse38 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))) 30))) (or (not .cse37) (forall ((v_ArrVal_291 Int)) (= (let ((.cse43 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse5 .cse24 (+ 10 .cse26)) .cse6 v_ArrVal_291)))) (let ((.cse44 (store (select .cse43 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse42 (select (select (store .cse43 |c_ULTIMATE.start_main_~b~0#1.base| .cse44) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse42 (select (select (store .cse43 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse44 .cse3 (+ .cse42 1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))) 30))))) (= |c_ULTIMATE.start_main_~i~0#1| 0)) (= 31 (select (let ((.cse49 (store .cse31 |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (let ((.cse47 (select .cse49 .cse50)) (.cse48 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse49) |c_ULTIMATE.start_main_~a~0#1.base|) .cse24))) (let ((.cse46 (store .cse49 .cse23 (+ .cse47 .cse48)))) (store .cse46 .cse35 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse46) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse47 .cse48))))) .cse21)))))))) is different from true [2023-02-15 10:02:19,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 10:02:37,204 WARN L233 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 122 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:03:03,820 WARN L233 SmtUtils]: Spent 23.80s on a formula simplification. DAG size of input: 132 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:03:24,824 WARN L233 SmtUtils]: Spent 14.61s on a formula simplification. DAG size of input: 125 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:03:29,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-02-15 10:03:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:03:39,371 INFO L93 Difference]: Finished difference Result 397 states and 459 transitions. [2023-02-15 10:03:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 10:03:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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 [2023-02-15 10:03:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:03:39,397 INFO L225 Difference]: With dead ends: 397 [2023-02-15 10:03:39,397 INFO L226 Difference]: Without dead ends: 226 [2023-02-15 10:03:39,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 85.1s TimeCoverageRelationStatistics Valid=532, Invalid=3375, Unknown=3, NotChecked=122, Total=4032 [2023-02-15 10:03:39,401 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 92 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:03:39,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 304 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 932 Invalid, 1 Unknown, 2 Unchecked, 16.4s Time] [2023-02-15 10:03:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-02-15 10:03:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 143. [2023-02-15 10:03:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 142 states have internal predecessors, (166), 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) [2023-02-15 10:03:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2023-02-15 10:03:39,437 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 38 [2023-02-15 10:03:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:03:39,437 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2023-02-15 10:03:39,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 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) [2023-02-15 10:03:39,438 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2023-02-15 10:03:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 10:03:39,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:03:39,439 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:03:39,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 10:03:39,644 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,SelfDestructingSolverStorable10 [2023-02-15 10:03:39,644 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:03:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:03:39,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1096318795, now seen corresponding path program 3 times [2023-02-15 10:03:39,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:03:39,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009159195] [2023-02-15 10:03:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:03:39,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:03:39,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:03:39,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434610089] [2023-02-15 10:03:39,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 10:03:39,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:03:39,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:03:39,706 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) [2023-02-15 10:03:39,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 10:03:40,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 10:03:40,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:03:40,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 10:03:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:03:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:03:40,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:03:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:03:40,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:03:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009159195] [2023-02-15 10:03:40,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:03:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434610089] [2023-02-15 10:03:40,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434610089] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:03:40,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:03:40,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-02-15 10:03:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943225781] [2023-02-15 10:03:40,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:03:40,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 10:03:40,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:03:40,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 10:03:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-15 10:03:40,432 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 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) [2023-02-15 10:03:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:03:40,713 INFO L93 Difference]: Finished difference Result 272 states and 305 transitions. [2023-02-15 10:03:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 10:03:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 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 [2023-02-15 10:03:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:03:40,714 INFO L225 Difference]: With dead ends: 272 [2023-02-15 10:03:40,714 INFO L226 Difference]: Without dead ends: 198 [2023-02-15 10:03:40,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-02-15 10:03:40,715 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 195 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:03:40,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 141 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 10:03:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-02-15 10:03:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 122. [2023-02-15 10:03:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 121 states have internal predecessors, (139), 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) [2023-02-15 10:03:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2023-02-15 10:03:40,732 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 39 [2023-02-15 10:03:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:03:40,733 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2023-02-15 10:03:40,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 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) [2023-02-15 10:03:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2023-02-15 10:03:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 10:03:40,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:03:40,733 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] [2023-02-15 10:03:40,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 10:03:40,936 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,SelfDestructingSolverStorable11 [2023-02-15 10:03:40,936 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:03:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:03:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash 173090424, now seen corresponding path program 5 times [2023-02-15 10:03:40,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:03:40,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467868667] [2023-02-15 10:03:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:03:40,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:03:40,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:03:40,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118315203] [2023-02-15 10:03:40,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 10:03:40,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:03:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:03:40,974 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) [2023-02-15 10:03:40,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 10:03:41,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 10:03:41,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:03:41,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 10:03:41,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:03:41,912 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:03:41,930 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:03:42,008 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:03:42,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-15 10:03:42,072 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:03:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-15 10:03:42,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,133 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:03:42,169 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:03:42,222 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:03:42,223 INFO L350 Elim1Store]: Elim1 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 139 treesize of output 127 [2023-02-15 10:03:42,226 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:03:42,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,229 INFO L350 Elim1Store]: Elim1 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 120 treesize of output 194 [2023-02-15 10:03:42,326 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:03:42,326 INFO L350 Elim1Store]: Elim1 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 79 treesize of output 71 [2023-02-15 10:03:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,333 INFO L350 Elim1Store]: Elim1 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 62 treesize of output 123 [2023-02-15 10:03:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:03:42,389 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 10:03:42,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2023-02-15 10:03:42,525 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 10:03:42,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2023-02-15 10:03:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:03:42,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:03:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:03:46,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:03:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467868667] [2023-02-15 10:03:46,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 10:03:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118315203] [2023-02-15 10:03:46,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118315203] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 10:03:46,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 10:03:46,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2023-02-15 10:03:46,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028842120] [2023-02-15 10:03:46,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 10:03:46,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 10:03:46,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:03:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 10:03:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 10:03:46,088 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 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) [2023-02-15 10:04:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:04:20,995 INFO L93 Difference]: Finished difference Result 483 states and 543 transitions. [2023-02-15 10:04:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-02-15 10:04:20,995 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 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 [2023-02-15 10:04:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:04:20,996 INFO L225 Difference]: With dead ends: 483 [2023-02-15 10:04:20,996 INFO L226 Difference]: Without dead ends: 368 [2023-02-15 10:04:20,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4353 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=2471, Invalid=11571, Unknown=0, NotChecked=0, Total=14042 [2023-02-15 10:04:20,999 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 954 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:04:21,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 320 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-02-15 10:04:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-02-15 10:04:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 170. [2023-02-15 10:04:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.1597633136094674) internal successors, (196), 169 states have internal predecessors, (196), 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) [2023-02-15 10:04:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 196 transitions. [2023-02-15 10:04:21,025 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 196 transitions. Word has length 40 [2023-02-15 10:04:21,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:04:21,026 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 196 transitions. [2023-02-15 10:04:21,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 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) [2023-02-15 10:04:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 196 transitions. [2023-02-15 10:04:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 10:04:21,026 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:04:21,026 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:04:21,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 10:04:21,232 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,SelfDestructingSolverStorable12 [2023-02-15 10:04:21,233 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:04:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:04:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1846236060, now seen corresponding path program 6 times [2023-02-15 10:04:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:04:21,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674422019] [2023-02-15 10:04:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:04:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:04:21,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 10:04:21,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721862225] [2023-02-15 10:04:21,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 10:04:21,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 10:04:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:04:21,247 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) [2023-02-15 10:04:21,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 10:04:21,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 10:04:21,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 10:04:21,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-15 10:04:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 10:04:21,797 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:04:21,820 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:04:21,861 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:04:21,866 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:04:21,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:21,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:21,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:21,870 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 10:04:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:21,898 INFO L350 Elim1Store]: Elim1 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 148 treesize of output 76 [2023-02-15 10:04:21,981 INFO L350 Elim1Store]: Elim1 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 133 treesize of output 120 [2023-02-15 10:04:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:21,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:21,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 201 [2023-02-15 10:04:22,108 INFO L350 Elim1Store]: Elim1 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 148 treesize of output 133 [2023-02-15 10:04:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 230 [2023-02-15 10:04:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 56 [2023-02-15 10:04:22,434 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:04:22,435 INFO L350 Elim1Store]: Elim1 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 169 treesize of output 151 [2023-02-15 10:04:22,445 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:04:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,449 INFO L350 Elim1Store]: Elim1 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 123 treesize of output 197 [2023-02-15 10:04:22,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,507 INFO L350 Elim1Store]: Elim1 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 118 treesize of output 59 [2023-02-15 10:04:22,675 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 10:04:22,676 INFO L350 Elim1Store]: Elim1 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 196 treesize of output 170 [2023-02-15 10:04:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,690 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:04:22,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,692 INFO L350 Elim1Store]: Elim1 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 146 treesize of output 222 [2023-02-15 10:04:22,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,765 INFO L350 Elim1Store]: Elim1 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 145 treesize of output 81 [2023-02-15 10:04:22,926 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:04:22,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,930 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:04:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 10:04:22,933 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 10:04:22,943 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2023-02-15 10:04:22,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 109 treesize of output 92 [2023-02-15 10:04:23,426 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-02-15 10:04:23,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 53 [2023-02-15 10:04:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:04:23,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 10:05:27,347 WARN L233 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 148 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 10:05:38,123 INFO L350 Elim1Store]: Elim1 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 349621262666 treesize of output 333635656010 [2023-02-15 10:05:42,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 10:05:42,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 311599659338 treesize of output 242901784906