./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array4_pattern.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:07:17,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:07:17,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:07:17,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:07:17,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:07:17,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:07:17,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:07:17,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:07:17,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:07:17,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:07:17,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:07:17,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:07:17,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:07:17,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:07:17,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:07:17,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:07:17,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:07:17,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:07:17,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:07:17,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:07:17,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:07:17,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:07:17,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:07:17,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:07:17,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:07:17,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:07:17,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:07:17,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:07:17,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:07:17,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:07:17,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:07:17,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:07:17,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:07:17,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:07:17,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:07:17,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:07:17,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:07:17,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:07:17,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:07:17,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:07:17,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:07:17,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:07:17,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:07:17,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:07:17,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:07:17,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:07:17,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:07:17,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:07:17,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:07:17,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:07:17,969 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:07:17,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:07:17,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:07:17,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:07:17,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:07:17,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:07:17,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:07:17,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:07:17,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:07:17,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:07:17,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:07:17,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:07:17,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:07:17,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:07:17,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:07:17,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:07:17,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:07:17,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:07:17,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:07:17,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:07:17,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:07:17,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:07:17,973 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:07:17,973 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:07:17,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:07:17,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:07:17,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2021-12-21 10:07:18,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:07:18,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:07:18,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:07:18,179 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:07:18,180 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:07:18,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2021-12-21 10:07:18,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af89fa29b/2f9c978f0aa64bbbb90d8f644b66743e/FLAG3a798e5b2 [2021-12-21 10:07:18,518 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:07:18,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2021-12-21 10:07:18,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af89fa29b/2f9c978f0aa64bbbb90d8f644b66743e/FLAG3a798e5b2 [2021-12-21 10:07:18,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af89fa29b/2f9c978f0aa64bbbb90d8f644b66743e [2021-12-21 10:07:18,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:07:18,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:07:18,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:07:18,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:07:18,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:07:18,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:07:18" (1/1) ... [2021-12-21 10:07:18,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f7bb0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:18, skipping insertion in model container [2021-12-21 10:07:18,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:07:18" (1/1) ... [2021-12-21 10:07:18,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:07:18,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:07:19,118 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-12-21 10:07:19,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:07:19,150 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:07:19,160 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-12-21 10:07:19,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:07:19,191 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:07:19,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19 WrapperNode [2021-12-21 10:07:19,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:07:19,195 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:07:19,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:07:19,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:07:19,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,228 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2021-12-21 10:07:19,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:07:19,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:07:19,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:07:19,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:07:19,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:07:19,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:07:19,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:07:19,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:07:19,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (1/1) ... [2021-12-21 10:07:19,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:07:19,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:19,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:07:19,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 10:07:19,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:07:19,320 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 10:07:19,321 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 10:07:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:07:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:07:19,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:07:19,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:07:19,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:07:19,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:07:19,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:07:19,371 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:07:19,372 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:07:19,550 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:07:19,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:07:19,556 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 10:07:19,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:07:19 BoogieIcfgContainer [2021-12-21 10:07:19,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:07:19,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:07:19,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:07:19,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:07:19,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:07:18" (1/3) ... [2021-12-21 10:07:19,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48bec29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:07:19, skipping insertion in model container [2021-12-21 10:07:19,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:19" (2/3) ... [2021-12-21 10:07:19,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48bec29f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:07:19, skipping insertion in model container [2021-12-21 10:07:19,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:07:19" (3/3) ... [2021-12-21 10:07:19,564 INFO L111 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2021-12-21 10:07:19,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:07:19,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:07:19,594 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:07:19,598 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:07:19,598 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:07:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 10:07:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 10:07:19,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:19,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:19,611 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:19,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2021-12-21 10:07:19,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:19,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588244129] [2021-12-21 10:07:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:19,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:19,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 10:07:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:07:19,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:19,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588244129] [2021-12-21 10:07:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588244129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:07:19,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:07:19,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:07:19,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46978452] [2021-12-21 10:07:19,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:07:19,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:07:19,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:19,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:07:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:07:19,788 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:07:19,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:19,804 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2021-12-21 10:07:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:07:19,807 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-21 10:07:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:19,812 INFO L225 Difference]: With dead ends: 63 [2021-12-21 10:07:19,812 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 10:07:19,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:07:19,817 INFO L933 BasicCegarLoop]: 40 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, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:19,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:07:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 10:07:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-21 10:07:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 10:07:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-21 10:07:19,845 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2021-12-21 10:07:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:19,845 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-21 10:07:19,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:07:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-21 10:07:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 10:07:19,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:19,848 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:19,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:07:19,849 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2021-12-21 10:07:19,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:19,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629471824] [2021-12-21 10:07:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:19,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:19,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:19,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998584778] [2021-12-21 10:07:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:19,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:19,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:19,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:07:19,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:07:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:07:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 10:07:20,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:07:20,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:20,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629471824] [2021-12-21 10:07:20,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:20,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998584778] [2021-12-21 10:07:20,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998584778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:07:20,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:07:20,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:07:20,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199304334] [2021-12-21 10:07:20,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:07:20,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:07:20,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:20,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:07:20,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:07:20,125 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:07:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:20,159 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-12-21 10:07:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:07:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-12-21 10:07:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:20,161 INFO L225 Difference]: With dead ends: 70 [2021-12-21 10:07:20,161 INFO L226 Difference]: Without dead ends: 48 [2021-12-21 10:07:20,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:07:20,162 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:20,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:07:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-21 10:07:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-12-21 10:07:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-21 10:07:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-21 10:07:20,182 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2021-12-21 10:07:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:20,183 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-21 10:07:20,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:07:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-21 10:07:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 10:07:20,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:20,185 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:20,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:20,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:20,393 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:20,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2021-12-21 10:07:20,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:20,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119201026] [2021-12-21 10:07:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:20,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:20,416 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:20,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095432773] [2021-12-21 10:07:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:20,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:20,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:20,419 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:07:20,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:07:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:20,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 10:07:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 10:07:20,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:07:20,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:20,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119201026] [2021-12-21 10:07:20,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:20,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095432773] [2021-12-21 10:07:20,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095432773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:07:20,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:07:20,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:07:20,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923823442] [2021-12-21 10:07:20,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:07:20,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:07:20,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:07:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:07:20,573 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:07:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:20,594 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-12-21 10:07:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:07:20,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-12-21 10:07:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:20,597 INFO L225 Difference]: With dead ends: 43 [2021-12-21 10:07:20,597 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 10:07:20,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:07:20,600 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:20,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:07:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 10:07:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-21 10:07:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-21 10:07:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-21 10:07:20,615 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2021-12-21 10:07:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:20,616 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-21 10:07:20,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:07:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-21 10:07:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 10:07:20,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:20,619 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:20,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:20,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 10:07:20,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2021-12-21 10:07:20,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953641259] [2021-12-21 10:07:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:20,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:20,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:20,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653337739] [2021-12-21 10:07:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:20,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:20,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:07:20,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:07:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:07:20,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:07:20,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:07:20,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953641259] [2021-12-21 10:07:20,997 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653337739] [2021-12-21 10:07:20,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653337739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:07:20,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:07:20,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:07:20,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854066232] [2021-12-21 10:07:20,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:07:20,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:07:20,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:20,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:07:20,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:07:20,999 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:07:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:21,068 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2021-12-21 10:07:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:07:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-12-21 10:07:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:21,070 INFO L225 Difference]: With dead ends: 77 [2021-12-21 10:07:21,070 INFO L226 Difference]: Without dead ends: 43 [2021-12-21 10:07:21,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:07:21,071 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:21,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:07:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-21 10:07:21,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-21 10:07:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-21 10:07:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-21 10:07:21,076 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2021-12-21 10:07:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:21,076 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-21 10:07:21,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:07:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-21 10:07:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 10:07:21,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:21,077 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:21,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:21,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:21,291 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2021-12-21 10:07:21,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818434798] [2021-12-21 10:07:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:21,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:21,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:21,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156279014] [2021-12-21 10:07:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:21,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:21,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:21,322 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:07:21,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:07:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:21,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 10:07:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:21,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:07:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:21,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-12-21 10:07:21,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-12-21 10:07:22,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:07:22,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 26 [2021-12-21 10:07:22,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:07:22,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:07:22,321 INFO L353 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-21 10:07:22,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 24 [2021-12-21 10:07:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:07:22,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:31,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:31,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818434798] [2021-12-21 10:07:31,004 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:31,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156279014] [2021-12-21 10:07:31,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156279014] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:07:31,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:07:31,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-21 10:07:31,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279886693] [2021-12-21 10:07:31,005 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:31,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 10:07:31,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:31,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 10:07:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=450, Unknown=7, NotChecked=0, Total=552 [2021-12-21 10:07:31,006 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-21 10:07:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:32,070 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-12-21 10:07:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 10:07:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2021-12-21 10:07:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:32,071 INFO L225 Difference]: With dead ends: 79 [2021-12-21 10:07:32,071 INFO L226 Difference]: Without dead ends: 75 [2021-12-21 10:07:32,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=124, Invalid=624, Unknown=8, NotChecked=0, Total=756 [2021-12-21 10:07:32,072 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:32,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 254 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2021-12-21 10:07:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-21 10:07:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2021-12-21 10:07:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-21 10:07:32,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2021-12-21 10:07:32,078 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2021-12-21 10:07:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:32,079 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2021-12-21 10:07:32,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-21 10:07:32,080 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2021-12-21 10:07:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 10:07:32,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:32,084 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:32,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:32,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:32,295 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2021-12-21 10:07:32,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:32,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379101908] [2021-12-21 10:07:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:32,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:32,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:32,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838708672] [2021-12-21 10:07:32,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:07:32,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:32,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:32,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:07:32,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:07:32,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:07:32,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:07:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:07:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:07:32,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 10:07:32,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379101908] [2021-12-21 10:07:32,564 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838708672] [2021-12-21 10:07:32,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838708672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:07:32,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:07:32,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-21 10:07:32,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082199231] [2021-12-21 10:07:32,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:32,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:07:32,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:07:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:07:32,566 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:07:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:32,706 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2021-12-21 10:07:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:07:32,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2021-12-21 10:07:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:32,707 INFO L225 Difference]: With dead ends: 150 [2021-12-21 10:07:32,707 INFO L226 Difference]: Without dead ends: 123 [2021-12-21 10:07:32,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:07:32,708 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:32,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 185 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:07:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-21 10:07:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2021-12-21 10:07:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-21 10:07:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2021-12-21 10:07:32,729 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 48 [2021-12-21 10:07:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:32,729 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2021-12-21 10:07:32,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:07:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2021-12-21 10:07:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 10:07:32,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:32,734 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:32,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:32,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:32,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2021-12-21 10:07:32,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:32,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335971224] [2021-12-21 10:07:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:32,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:32,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:32,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351491396] [2021-12-21 10:07:32,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:07:32,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:32,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:32,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:07:32,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:07:33,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 10:07:33,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:07:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 10:07:33,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:33,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:07:33,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:33,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 40 [2021-12-21 10:07:33,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-12-21 10:07:33,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2021-12-21 10:07:33,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:07:33,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 41 [2021-12-21 10:07:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 10:07:33,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:34,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:34,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335971224] [2021-12-21 10:07:34,007 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:34,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351491396] [2021-12-21 10:07:34,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351491396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:07:34,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:07:34,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-21 10:07:34,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380121481] [2021-12-21 10:07:34,007 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:34,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 10:07:34,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 10:07:34,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=478, Unknown=1, NotChecked=0, Total=600 [2021-12-21 10:07:34,008 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 10:07:34,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:34,308 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2021-12-21 10:07:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 10:07:34,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2021-12-21 10:07:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:34,311 INFO L225 Difference]: With dead ends: 136 [2021-12-21 10:07:34,311 INFO L226 Difference]: Without dead ends: 132 [2021-12-21 10:07:34,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=894, Unknown=1, NotChecked=0, Total=1122 [2021-12-21 10:07:34,312 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:34,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 126 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 202 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2021-12-21 10:07:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-21 10:07:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-12-21 10:07:34,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 91 states have internal predecessors, (99), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 10:07:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2021-12-21 10:07:34,330 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 48 [2021-12-21 10:07:34,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:34,330 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2021-12-21 10:07:34,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 10:07:34,330 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2021-12-21 10:07:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 10:07:34,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:34,331 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:34,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:34,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:34,548 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:34,549 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2021-12-21 10:07:34,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:34,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034923212] [2021-12-21 10:07:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:34,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:34,562 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:34,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554107007] [2021-12-21 10:07:34,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:07:34,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:34,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:34,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:07:34,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:07:34,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:07:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:07:34,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 10:07:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:34,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:07:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:34,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-21 10:07:34,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-21 10:07:34,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-12-21 10:07:34,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-12-21 10:07:34,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:34,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:34,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 53 [2021-12-21 10:07:37,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:37,938 INFO L353 Elim1Store]: treesize reduction 114, result has 42.1 percent of original size [2021-12-21 10:07:37,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 117 [2021-12-21 10:07:39,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:39,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:07:39,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:39,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:07:39,422 INFO L353 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-12-21 10:07:39,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 140 treesize of output 72 [2021-12-21 10:07:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 10:07:39,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:43,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:43,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034923212] [2021-12-21 10:07:43,999 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:43,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554107007] [2021-12-21 10:07:43,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554107007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:07:43,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:07:44,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-21 10:07:44,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382512775] [2021-12-21 10:07:44,000 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:44,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 10:07:44,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 10:07:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1069, Unknown=2, NotChecked=0, Total=1260 [2021-12-21 10:07:44,001 INFO L87 Difference]: Start difference. First operand 126 states and 157 transitions. Second operand has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-21 10:07:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:44,148 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2021-12-21 10:07:44,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 10:07:44,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-12-21 10:07:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:44,150 INFO L225 Difference]: With dead ends: 160 [2021-12-21 10:07:44,150 INFO L226 Difference]: Without dead ends: 156 [2021-12-21 10:07:44,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=196, Invalid=1134, Unknown=2, NotChecked=0, Total=1332 [2021-12-21 10:07:44,151 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 32 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:44,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 392 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 312 Unchecked, 0.1s Time] [2021-12-21 10:07:44,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-21 10:07:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2021-12-21 10:07:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 110 states have internal predecessors, (120), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-21 10:07:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2021-12-21 10:07:44,179 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 50 [2021-12-21 10:07:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:44,179 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2021-12-21 10:07:44,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-21 10:07:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2021-12-21 10:07:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 10:07:44,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:44,180 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:44,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:44,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:44,409 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash -293138951, now seen corresponding path program 5 times [2021-12-21 10:07:44,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:44,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162985801] [2021-12-21 10:07:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:44,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:44,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:44,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381204651] [2021-12-21 10:07:44,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:07:44,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:44,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:44,424 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:07:44,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:07:44,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-21 10:07:44,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:07:44,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:07:44,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:07:44,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 10:07:44,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:44,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162985801] [2021-12-21 10:07:44,700 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:44,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381204651] [2021-12-21 10:07:44,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381204651] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:07:44,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:07:44,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-21 10:07:44,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323968093] [2021-12-21 10:07:44,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:44,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:07:44,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:07:44,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:07:44,701 INFO L87 Difference]: Start difference. First operand 151 states and 186 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:07:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:45,049 INFO L93 Difference]: Finished difference Result 330 states and 412 transitions. [2021-12-21 10:07:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:07:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-12-21 10:07:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:45,051 INFO L225 Difference]: With dead ends: 330 [2021-12-21 10:07:45,052 INFO L226 Difference]: Without dead ends: 252 [2021-12-21 10:07:45,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:07:45,053 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 196 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:45,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 212 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:07:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-21 10:07:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 218. [2021-12-21 10:07:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 151 states have (on average 1.119205298013245) internal successors, (169), 154 states have internal predecessors, (169), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2021-12-21 10:07:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 279 transitions. [2021-12-21 10:07:45,078 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 279 transitions. Word has length 52 [2021-12-21 10:07:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:45,079 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 279 transitions. [2021-12-21 10:07:45,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:07:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 279 transitions. [2021-12-21 10:07:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 10:07:45,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:45,080 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:45,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:45,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-21 10:07:45,293 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 6 times [2021-12-21 10:07:45,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:45,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803619164] [2021-12-21 10:07:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:45,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:45,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:45,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110398835] [2021-12-21 10:07:45,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 10:07:45,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:45,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:45,312 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) [2021-12-21 10:07:45,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:07:45,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-21 10:07:45,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:07:45,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:07:45,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:07:45,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 10:07:45,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803619164] [2021-12-21 10:07:45,643 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110398835] [2021-12-21 10:07:45,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110398835] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:07:45,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:07:45,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-21 10:07:45,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759769247] [2021-12-21 10:07:45,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:45,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:07:45,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:45,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:07:45,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:07:45,645 INFO L87 Difference]: Start difference. First operand 218 states and 279 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:07:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:46,014 INFO L93 Difference]: Finished difference Result 247 states and 306 transitions. [2021-12-21 10:07:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:07:46,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-12-21 10:07:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:46,016 INFO L225 Difference]: With dead ends: 247 [2021-12-21 10:07:46,016 INFO L226 Difference]: Without dead ends: 243 [2021-12-21 10:07:46,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-21 10:07:46,017 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 78 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:46,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 301 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:07:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-21 10:07:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 223. [2021-12-21 10:07:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 158 states have internal predecessors, (173), 55 states have call successors, (55), 12 states have call predecessors, (55), 12 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2021-12-21 10:07:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 283 transitions. [2021-12-21 10:07:46,032 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 283 transitions. Word has length 52 [2021-12-21 10:07:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:46,032 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 283 transitions. [2021-12-21 10:07:46,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:07:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 283 transitions. [2021-12-21 10:07:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:07:46,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:46,033 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:46,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-21 10:07:46,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 10:07:46,247 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:46,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 7 times [2021-12-21 10:07:46,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:46,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983889247] [2021-12-21 10:07:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:46,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:46,259 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:46,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760177207] [2021-12-21 10:07:46,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 10:07:46,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:46,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:46,262 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) [2021-12-21 10:07:46,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 10:07:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:46,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-21 10:07:46,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:46,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:07:46,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-21 10:07:46,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-21 10:07:46,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-12-21 10:07:46,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-12-21 10:07:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 53 [2021-12-21 10:07:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 67 [2021-12-21 10:07:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:51,796 INFO L353 Elim1Store]: treesize reduction 132, result has 39.7 percent of original size [2021-12-21 10:07:51,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 127 [2021-12-21 10:07:52,672 INFO L353 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-12-21 10:07:52,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 85 [2021-12-21 10:07:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 10:07:52,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:59,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:59,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983889247] [2021-12-21 10:07:59,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:59,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760177207] [2021-12-21 10:07:59,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760177207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:07:59,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:07:59,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-21 10:07:59,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71752982] [2021-12-21 10:07:59,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:59,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 10:07:59,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 10:07:59,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1101, Unknown=7, NotChecked=0, Total=1260 [2021-12-21 10:07:59,397 INFO L87 Difference]: Start difference. First operand 223 states and 283 transitions. Second operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-21 10:08:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:00,294 INFO L93 Difference]: Finished difference Result 266 states and 334 transitions. [2021-12-21 10:08:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-21 10:08:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2021-12-21 10:08:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:00,296 INFO L225 Difference]: With dead ends: 266 [2021-12-21 10:08:00,297 INFO L226 Difference]: Without dead ends: 262 [2021-12-21 10:08:00,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=197, Invalid=1518, Unknown=7, NotChecked=0, Total=1722 [2021-12-21 10:08:00,298 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:00,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 367 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 851 Invalid, 0 Unknown, 83 Unchecked, 0.7s Time] [2021-12-21 10:08:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-21 10:08:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-12-21 10:08:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 174 states have (on average 1.1149425287356323) internal successors, (194), 177 states have internal predecessors, (194), 59 states have call successors, (59), 14 states have call predecessors, (59), 14 states have return successors, (59), 56 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-21 10:08:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 312 transitions. [2021-12-21 10:08:00,315 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 312 transitions. Word has length 54 [2021-12-21 10:08:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:00,315 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 312 transitions. [2021-12-21 10:08:00,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-21 10:08:00,315 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 312 transitions. [2021-12-21 10:08:00,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:08:00,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:00,316 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:00,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-21 10:08:00,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 10:08:00,523 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:00,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 8 times [2021-12-21 10:08:00,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:00,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724848030] [2021-12-21 10:08:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:00,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:00,535 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:00,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858768984] [2021-12-21 10:08:00,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:08:00,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:00,542 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) [2021-12-21 10:08:00,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 10:08:00,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:08:00,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:00,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:08:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:08:00,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 10:08:00,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:00,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724848030] [2021-12-21 10:08:00,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:00,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858768984] [2021-12-21 10:08:00,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858768984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:00,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:08:00,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-21 10:08:00,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847311471] [2021-12-21 10:08:00,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:00,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 10:08:00,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:00,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 10:08:00,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:08:00,842 INFO L87 Difference]: Start difference. First operand 248 states and 312 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:08:01,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:01,268 INFO L93 Difference]: Finished difference Result 544 states and 693 transitions. [2021-12-21 10:08:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 10:08:01,268 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-21 10:08:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:01,270 INFO L225 Difference]: With dead ends: 544 [2021-12-21 10:08:01,270 INFO L226 Difference]: Without dead ends: 393 [2021-12-21 10:08:01,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-12-21 10:08:01,272 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 292 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:01,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 306 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:08:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-21 10:08:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 338. [2021-12-21 10:08:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 232 states have (on average 1.1163793103448276) internal successors, (259), 236 states have internal predecessors, (259), 89 states have call successors, (89), 16 states have call predecessors, (89), 16 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-12-21 10:08:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 437 transitions. [2021-12-21 10:08:01,301 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 437 transitions. Word has length 56 [2021-12-21 10:08:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:01,301 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 437 transitions. [2021-12-21 10:08:01,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:08:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 437 transitions. [2021-12-21 10:08:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 10:08:01,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:01,302 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:01,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:01,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 10:08:01,509 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:01,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525379, now seen corresponding path program 9 times [2021-12-21 10:08:01,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:01,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109164597] [2021-12-21 10:08:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:01,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:01,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:01,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696866640] [2021-12-21 10:08:01,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:08:01,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:01,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:01,522 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) [2021-12-21 10:08:01,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 10:08:01,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-21 10:08:01,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:01,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:08:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:08:01,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 10:08:01,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:01,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109164597] [2021-12-21 10:08:01,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:01,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696866640] [2021-12-21 10:08:01,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696866640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:01,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:08:01,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-21 10:08:01,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139736748] [2021-12-21 10:08:01,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:01,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 10:08:01,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 10:08:01,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:08:01,897 INFO L87 Difference]: Start difference. First operand 338 states and 437 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:08:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:02,580 INFO L93 Difference]: Finished difference Result 372 states and 468 transitions. [2021-12-21 10:08:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 10:08:02,583 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-21 10:08:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:02,585 INFO L225 Difference]: With dead ends: 372 [2021-12-21 10:08:02,585 INFO L226 Difference]: Without dead ends: 368 [2021-12-21 10:08:02,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-12-21 10:08:02,586 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 125 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:02,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 310 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:08:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-21 10:08:02,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 340. [2021-12-21 10:08:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 234 states have (on average 1.1153846153846154) internal successors, (261), 238 states have internal predecessors, (261), 89 states have call successors, (89), 16 states have call predecessors, (89), 16 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-12-21 10:08:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 439 transitions. [2021-12-21 10:08:02,617 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 439 transitions. Word has length 56 [2021-12-21 10:08:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:02,618 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 439 transitions. [2021-12-21 10:08:02,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:08:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 439 transitions. [2021-12-21 10:08:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 10:08:02,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:02,621 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:02,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:02,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 10:08:02,835 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 10 times [2021-12-21 10:08:02,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:02,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247348092] [2021-12-21 10:08:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:02,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:02,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:02,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333924868] [2021-12-21 10:08:02,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:08:02,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:02,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:02,852 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) [2021-12-21 10:08:02,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 10:08:03,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:08:03,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:03,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-21 10:08:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:03,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:08:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-21 10:08:03,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-12-21 10:08:03,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-21 10:08:03,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 53 [2021-12-21 10:08:03,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 67 [2021-12-21 10:08:03,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:03,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2021-12-21 10:08:05,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:05,258 INFO L353 Elim1Store]: treesize reduction 180, result has 39.4 percent of original size [2021-12-21 10:08:05,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 163 [2021-12-21 10:08:07,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:07,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:08:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:07,120 INFO L353 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-21 10:08:07,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 269 treesize of output 139 [2021-12-21 10:08:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:08:07,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:11,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:11,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247348092] [2021-12-21 10:08:11,713 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:11,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333924868] [2021-12-21 10:08:11,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333924868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:11,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:08:11,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-21 10:08:11,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696678281] [2021-12-21 10:08:11,713 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:11,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 10:08:11,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 10:08:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2286, Unknown=0, NotChecked=0, Total=2652 [2021-12-21 10:08:11,715 INFO L87 Difference]: Start difference. First operand 340 states and 439 transitions. Second operand has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 10:08:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:13,646 INFO L93 Difference]: Finished difference Result 382 states and 490 transitions. [2021-12-21 10:08:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-21 10:08:13,646 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 58 [2021-12-21 10:08:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:13,648 INFO L225 Difference]: With dead ends: 382 [2021-12-21 10:08:13,648 INFO L226 Difference]: Without dead ends: 378 [2021-12-21 10:08:13,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=434, Invalid=2758, Unknown=0, NotChecked=0, Total=3192 [2021-12-21 10:08:13,649 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:13,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 414 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1163 Invalid, 0 Unknown, 95 Unchecked, 1.3s Time] [2021-12-21 10:08:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-21 10:08:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 361. [2021-12-21 10:08:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 250 states have (on average 1.116) internal successors, (279), 254 states have internal predecessors, (279), 93 states have call successors, (93), 17 states have call predecessors, (93), 17 states have return successors, (93), 89 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-21 10:08:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 465 transitions. [2021-12-21 10:08:13,683 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 465 transitions. Word has length 58 [2021-12-21 10:08:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:13,684 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 465 transitions. [2021-12-21 10:08:13,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 10:08:13,684 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 465 transitions. [2021-12-21 10:08:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:08:13,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:13,684 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:13,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:13,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 10:08:13,903 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:13,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:13,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1400995841, now seen corresponding path program 11 times [2021-12-21 10:08:13,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:13,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124015748] [2021-12-21 10:08:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:13,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:13,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:13,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046529713] [2021-12-21 10:08:13,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:08:13,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:13,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:13,932 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) [2021-12-21 10:08:13,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 10:08:14,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-21 10:08:14,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 10:08:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:08:14,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 10:08:14,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124015748] [2021-12-21 10:08:14,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046529713] [2021-12-21 10:08:14,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046529713] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:14,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:08:14,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-12-21 10:08:14,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510559989] [2021-12-21 10:08:14,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:14,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 10:08:14,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 10:08:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:08:14,351 INFO L87 Difference]: Start difference. First operand 361 states and 465 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:08:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:15,314 INFO L93 Difference]: Finished difference Result 849 states and 1100 transitions. [2021-12-21 10:08:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 10:08:15,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2021-12-21 10:08:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:15,316 INFO L225 Difference]: With dead ends: 849 [2021-12-21 10:08:15,316 INFO L226 Difference]: Without dead ends: 604 [2021-12-21 10:08:15,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 10:08:15,317 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 520 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:15,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 400 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:08:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-12-21 10:08:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 471. [2021-12-21 10:08:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 320 states have (on average 1.11875) internal successors, (358), 325 states have internal predecessors, (358), 131 states have call successors, (131), 19 states have call predecessors, (131), 19 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2021-12-21 10:08:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 620 transitions. [2021-12-21 10:08:15,364 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 620 transitions. Word has length 60 [2021-12-21 10:08:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:15,364 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 620 transitions. [2021-12-21 10:08:15,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:08:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 620 transitions. [2021-12-21 10:08:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:08:15,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:15,365 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:15,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:15,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:15,583 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:15,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1599277695, now seen corresponding path program 12 times [2021-12-21 10:08:15,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:15,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672086069] [2021-12-21 10:08:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:15,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:15,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:15,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074241371] [2021-12-21 10:08:15,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 10:08:15,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:15,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:15,604 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:08:15,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 10:08:15,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-21 10:08:15,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:15,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 10:08:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 10:08:15,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 10:08:16,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:16,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672086069] [2021-12-21 10:08:16,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:16,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074241371] [2021-12-21 10:08:16,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074241371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:16,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:08:16,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-12-21 10:08:16,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016932598] [2021-12-21 10:08:16,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:16,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 10:08:16,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 10:08:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:08:16,054 INFO L87 Difference]: Start difference. First operand 471 states and 620 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:08:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:17,082 INFO L93 Difference]: Finished difference Result 523 states and 668 transitions. [2021-12-21 10:08:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 10:08:17,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2021-12-21 10:08:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:17,085 INFO L225 Difference]: With dead ends: 523 [2021-12-21 10:08:17,085 INFO L226 Difference]: Without dead ends: 519 [2021-12-21 10:08:17,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-12-21 10:08:17,086 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 126 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:17,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 646 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:08:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-21 10:08:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 473. [2021-12-21 10:08:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 322 states have (on average 1.1180124223602483) internal successors, (360), 327 states have internal predecessors, (360), 131 states have call successors, (131), 19 states have call predecessors, (131), 19 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2021-12-21 10:08:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 622 transitions. [2021-12-21 10:08:17,119 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 622 transitions. Word has length 60 [2021-12-21 10:08:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:17,119 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 622 transitions. [2021-12-21 10:08:17,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 10:08:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 622 transitions. [2021-12-21 10:08:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 10:08:17,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:17,121 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:17,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:17,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 10:08:17,327 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash 745660931, now seen corresponding path program 13 times [2021-12-21 10:08:17,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:17,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854013236] [2021-12-21 10:08:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:17,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:17,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:17,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473811187] [2021-12-21 10:08:17,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 10:08:17,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:17,342 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:08:17,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 10:08:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:17,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-21 10:08:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:17,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:08:17,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-21 10:08:17,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-21 10:08:17,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-12-21 10:08:17,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-12-21 10:08:17,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 54 treesize of output 43 [2021-12-21 10:08:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing 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 78 treesize of output 73 [2021-12-21 10:08:17,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:17,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 103 [2021-12-21 10:08:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:18,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2021-12-21 10:08:28,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:28,819 INFO L353 Elim1Store]: treesize reduction 228, result has 39.2 percent of original size [2021-12-21 10:08:28,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 199 [2021-12-21 10:08:31,999 INFO L353 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2021-12-21 10:08:32,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2021-12-21 10:08:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 10:08:32,101 INFO L328 TraceCheckSpWp]: Computing backward predicates...