./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 ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-ae00767 [2021-12-27 21:42:29,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:42:29,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:42:29,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:42:29,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:42:29,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:42:29,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:42:29,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:42:29,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:42:29,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:42:29,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:42:29,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:42:29,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:42:29,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:42:29,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:42:29,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:42:29,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:42:29,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:42:29,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:42:29,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:42:29,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:42:29,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:42:29,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:42:29,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:42:29,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:42:29,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:42:29,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:42:29,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:42:29,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:42:29,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:42:29,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:42:29,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:42:29,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:42:29,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:42:29,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:42:29,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:42:29,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:42:29,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:42:29,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:42:29,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:42:29,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:42:29,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:42:29,170 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:42:29,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:42:29,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:42:29,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:42:29,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:42:29,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:42:29,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:42:29,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:42:29,172 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:42:29,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:42:29,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:42:29,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:42:29,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:42:29,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:42:29,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:42:29,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:42:29,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:42:29,174 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:42:29,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:42:29,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:42:29,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:42:29,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:42:29,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:42:29,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:42:29,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:42:29,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:42:29,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:42:29,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:42:29,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:42:29,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:42:29,177 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:42:29,177 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:42:29,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:42:29,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2021-12-27 21:42:29,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:42:29,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:42:29,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:42:29,492 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:42:29,493 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:42:29,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2021-12-27 21:42:29,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc2cc6bcc/3fe85028e0b240838c69b50cd7ef2ce7/FLAG4ef6885c8 [2021-12-27 21:42:29,886 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:42:29,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2021-12-27 21:42:29,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc2cc6bcc/3fe85028e0b240838c69b50cd7ef2ce7/FLAG4ef6885c8 [2021-12-27 21:42:29,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc2cc6bcc/3fe85028e0b240838c69b50cd7ef2ce7 [2021-12-27 21:42:29,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:42:29,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:42:29,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:42:29,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:42:29,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:42:29,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:42:29" (1/1) ... [2021-12-27 21:42:29,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30338b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:29, skipping insertion in model container [2021-12-27 21:42:29,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:42:29" (1/1) ... [2021-12-27 21:42:29,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:42:29,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:42:30,037 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] [2021-12-27 21:42:30,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:42:30,101 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:42:30,109 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] [2021-12-27 21:42:30,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:42:30,138 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:42:30,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30 WrapperNode [2021-12-27 21:42:30,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:42:30,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:42:30,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:42:30,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:42:30,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,175 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2021-12-27 21:42:30,175 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:42:30,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:42:30,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:42:30,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:42:30,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:42:30,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:42:30,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:42:30,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:42:30,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (1/1) ... [2021-12-27 21:42:30,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:42:30,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:30,232 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) [2021-12-27 21:42:30,238 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 [2021-12-27 21:42:30,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:42:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-27 21:42:30,259 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-27 21:42:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:42:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:42:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:42:30,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:42:30,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:42:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:42:30,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:42:30,304 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:42:30,305 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:42:30,407 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:42:30,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:42:30,412 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-27 21:42:30,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:42:30 BoogieIcfgContainer [2021-12-27 21:42:30,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:42:30,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:42:30,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:42:30,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:42:30,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:42:29" (1/3) ... [2021-12-27 21:42:30,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8b07a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:42:30, skipping insertion in model container [2021-12-27 21:42:30,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:42:30" (2/3) ... [2021-12-27 21:42:30,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8b07a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:42:30, skipping insertion in model container [2021-12-27 21:42:30,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:42:30" (3/3) ... [2021-12-27 21:42:30,447 INFO L111 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2021-12-27 21:42:30,451 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:42:30,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:42:30,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:42:30,512 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 [2021-12-27 21:42:30,512 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:42:30,528 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) [2021-12-27 21:42:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-27 21:42:30,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:30,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:30,533 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2021-12-27 21:42:30,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:30,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649192074] [2021-12-27 21:42:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:30,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:30,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:42:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:42:30,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:30,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649192074] [2021-12-27 21:42:30,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649192074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:30,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:30,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:42:30,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955658507] [2021-12-27 21:42:30,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:30,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:42:30,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:42:30,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:42:30,707 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) [2021-12-27 21:42:30,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:30,725 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2021-12-27 21:42:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:42:30,728 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 [2021-12-27 21:42:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:30,732 INFO L225 Difference]: With dead ends: 63 [2021-12-27 21:42:30,732 INFO L226 Difference]: Without dead ends: 29 [2021-12-27 21:42:30,735 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 [2021-12-27 21:42:30,738 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 [2021-12-27 21:42:30,739 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] [2021-12-27 21:42:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-27 21:42:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-27 21:42:30,765 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) [2021-12-27 21:42:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-27 21:42:30,767 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2021-12-27 21:42:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:30,768 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-27 21:42:30,768 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) [2021-12-27 21:42:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-27 21:42:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-27 21:42:30,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:30,770 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] [2021-12-27 21:42:30,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:42:30,771 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:30,774 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2021-12-27 21:42:30,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:30,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686316716] [2021-12-27 21:42:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:30,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:30,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:30,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302004928] [2021-12-27 21:42:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:30,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:30,835 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) [2021-12-27 21:42:30,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:42:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:30,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 21:42:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-27 21:42:31,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:31,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:31,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686316716] [2021-12-27 21:42:31,072 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:31,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302004928] [2021-12-27 21:42:31,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302004928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:31,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:31,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:42:31,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852676817] [2021-12-27 21:42:31,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:31,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:42:31,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:42:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:42:31,074 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) [2021-12-27 21:42:31,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:31,120 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-12-27 21:42:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:42:31,120 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 [2021-12-27 21:42:31,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:31,121 INFO L225 Difference]: With dead ends: 70 [2021-12-27 21:42:31,121 INFO L226 Difference]: Without dead ends: 48 [2021-12-27 21:42:31,122 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 [2021-12-27 21:42:31,123 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 [2021-12-27 21:42:31,123 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] [2021-12-27 21:42:31,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-27 21:42:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-12-27 21:42:31,131 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) [2021-12-27 21:42:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-27 21:42:31,132 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2021-12-27 21:42:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:31,134 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-27 21:42:31,134 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) [2021-12-27 21:42:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-27 21:42:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-27 21:42:31,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:31,136 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] [2021-12-27 21:42:31,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:31,343 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 [2021-12-27 21:42:31,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2021-12-27 21:42:31,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:31,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878828521] [2021-12-27 21:42:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:31,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:31,366 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:31,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371719623] [2021-12-27 21:42:31,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:31,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:31,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:31,368 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) [2021-12-27 21:42:31,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:42:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:31,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-27 21:42:31,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-27 21:42:31,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:31,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:31,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878828521] [2021-12-27 21:42:31,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:31,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371719623] [2021-12-27 21:42:31,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371719623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:31,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:31,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:42:31,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937750123] [2021-12-27 21:42:31,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:31,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:42:31,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:31,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:42:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:42:31,527 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) [2021-12-27 21:42:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:31,540 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-12-27 21:42:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:42:31,541 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 [2021-12-27 21:42:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:31,541 INFO L225 Difference]: With dead ends: 43 [2021-12-27 21:42:31,542 INFO L226 Difference]: Without dead ends: 39 [2021-12-27 21:42:31,542 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 [2021-12-27 21:42:31,543 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 [2021-12-27 21:42:31,543 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] [2021-12-27 21:42:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-27 21:42:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-27 21:42:31,547 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) [2021-12-27 21:42:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-27 21:42:31,548 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2021-12-27 21:42:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:31,548 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-27 21:42:31,549 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) [2021-12-27 21:42:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-27 21:42:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-27 21:42:31,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:31,550 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] [2021-12-27 21:42:31,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:31,763 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 [2021-12-27 21:42:31,763 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:31,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:31,764 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2021-12-27 21:42:31,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:31,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041387830] [2021-12-27 21:42:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:31,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:31,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:31,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798935522] [2021-12-27 21:42:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:31,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:31,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:31,788 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) [2021-12-27 21:42:31,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:42:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:31,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:42:31,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 21:42:31,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:31,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:31,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041387830] [2021-12-27 21:42:31,944 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:31,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798935522] [2021-12-27 21:42:31,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798935522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:31,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:31,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:42:31,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548926072] [2021-12-27 21:42:31,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:31,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:42:31,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:31,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:42:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:42:31,947 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) [2021-12-27 21:42:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:32,033 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2021-12-27 21:42:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 21:42:32,034 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 [2021-12-27 21:42:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:32,036 INFO L225 Difference]: With dead ends: 77 [2021-12-27 21:42:32,036 INFO L226 Difference]: Without dead ends: 43 [2021-12-27 21:42:32,037 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 [2021-12-27 21:42:32,041 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:32,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:32,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-27 21:42:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-27 21:42:32,054 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) [2021-12-27 21:42:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-27 21:42:32,058 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2021-12-27 21:42:32,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:32,060 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-27 21:42:32,062 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) [2021-12-27 21:42:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-27 21:42:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-27 21:42:32,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:32,065 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] [2021-12-27 21:42:32,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:32,266 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 [2021-12-27 21:42:32,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:32,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2021-12-27 21:42:32,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:32,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412973040] [2021-12-27 21:42:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:32,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:32,285 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:32,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272209879] [2021-12-27 21:42:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:32,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:32,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:32,287 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) [2021-12-27 21:42:32,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:42:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-27 21:42:32,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:32,393 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 [2021-12-27 21:42:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:32,447 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 [2021-12-27 21:42:32,451 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 [2021-12-27 21:42:33,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 21:42:33,117 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 [2021-12-27 21:42:33,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 21:42:33,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 21:42:33,318 INFO L353 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-27 21:42:33,318 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 [2021-12-27 21:42:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:42:33,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:39,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:39,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412973040] [2021-12-27 21:42:39,997 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:39,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272209879] [2021-12-27 21:42:39,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272209879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:42:39,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:42:39,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-27 21:42:39,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320163697] [2021-12-27 21:42:39,997 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:39,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-27 21:42:39,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:39,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-27 21:42:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=451, Unknown=6, NotChecked=0, Total=552 [2021-12-27 21:42:39,998 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) [2021-12-27 21:42:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:40,155 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-12-27 21:42:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-27 21:42:40,156 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 [2021-12-27 21:42:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:40,156 INFO L225 Difference]: With dead ends: 79 [2021-12-27 21:42:40,156 INFO L226 Difference]: Without dead ends: 75 [2021-12-27 21:42:40,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=124, Invalid=626, Unknown=6, NotChecked=0, Total=756 [2021-12-27 21:42:40,158 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 [2021-12-27 21:42:40,158 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] [2021-12-27 21:42:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-27 21:42:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2021-12-27 21:42:40,170 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) [2021-12-27 21:42:40,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2021-12-27 21:42:40,173 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2021-12-27 21:42:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:40,174 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2021-12-27 21:42:40,174 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) [2021-12-27 21:42:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2021-12-27 21:42:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-27 21:42:40,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:40,175 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] [2021-12-27 21:42:40,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:40,383 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 [2021-12-27 21:42:40,383 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:40,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2021-12-27 21:42:40,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:40,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428910497] [2021-12-27 21:42:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:40,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:40,407 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:40,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335392077] [2021-12-27 21:42:40,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:42:40,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:40,411 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) [2021-12-27 21:42:40,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:42:40,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:42:40,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:40,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:42:40,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 21:42:40,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-27 21:42:40,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428910497] [2021-12-27 21:42:40,649 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335392077] [2021-12-27 21:42:40,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335392077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:40,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:40,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-27 21:42:40,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106386068] [2021-12-27 21:42:40,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:40,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 21:42:40,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 21:42:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:42:40,651 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) [2021-12-27 21:42:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:40,792 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2021-12-27 21:42:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-27 21:42:40,792 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 [2021-12-27 21:42:40,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:40,794 INFO L225 Difference]: With dead ends: 150 [2021-12-27 21:42:40,795 INFO L226 Difference]: Without dead ends: 123 [2021-12-27 21:42:40,795 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 [2021-12-27 21:42:40,796 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 [2021-12-27 21:42:40,796 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] [2021-12-27 21:42:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-27 21:42:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2021-12-27 21:42:40,821 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) [2021-12-27 21:42:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2021-12-27 21:42:40,824 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 48 [2021-12-27 21:42:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:40,825 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2021-12-27 21:42:40,825 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) [2021-12-27 21:42:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2021-12-27 21:42:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-27 21:42:40,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:40,829 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] [2021-12-27 21:42:40,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:41,043 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 [2021-12-27 21:42:41,043 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:41,044 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2021-12-27 21:42:41,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:41,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276173363] [2021-12-27 21:42:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:41,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:41,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:41,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728227933] [2021-12-27 21:42:41,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:42:41,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:41,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:41,075 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) [2021-12-27 21:42:41,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:42:41,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-27 21:42:41,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:41,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-27 21:42:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:41,153 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 [2021-12-27 21:42:41,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:41,583 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 [2021-12-27 21:42:41,589 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 [2021-12-27 21:42:41,594 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 [2021-12-27 21:42:41,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 21:42:41,800 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 [2021-12-27 21:42:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-27 21:42:41,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:42,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:42,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276173363] [2021-12-27 21:42:42,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:42,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728227933] [2021-12-27 21:42:42,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728227933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:42:42,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:42:42,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-27 21:42:42,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922068758] [2021-12-27 21:42:42,140 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:42,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-27 21:42:42,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-27 21:42:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=478, Unknown=1, NotChecked=0, Total=600 [2021-12-27 21:42:42,141 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) [2021-12-27 21:42:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:42,441 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2021-12-27 21:42:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-27 21:42:42,442 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 [2021-12-27 21:42:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:42,444 INFO L225 Difference]: With dead ends: 136 [2021-12-27 21:42:42,444 INFO L226 Difference]: Without dead ends: 132 [2021-12-27 21:42:42,444 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 [2021-12-27 21:42:42,445 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 [2021-12-27 21:42:42,445 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] [2021-12-27 21:42:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-27 21:42:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-12-27 21:42:42,454 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) [2021-12-27 21:42:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2021-12-27 21:42:42,455 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 48 [2021-12-27 21:42:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:42,455 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2021-12-27 21:42:42,455 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) [2021-12-27 21:42:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2021-12-27 21:42:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-27 21:42:42,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:42,456 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] [2021-12-27 21:42:42,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:42,670 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 [2021-12-27 21:42:42,671 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2021-12-27 21:42:42,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:42,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50645075] [2021-12-27 21:42:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:42,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:42,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:42,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116778635] [2021-12-27 21:42:42,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:42:42,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:42,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:42,701 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) [2021-12-27 21:42:42,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:42:42,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:42:42,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-27 21:42:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:42,800 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 [2021-12-27 21:42:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:42,824 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 [2021-12-27 21:42:42,827 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 [2021-12-27 21:42:42,830 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 [2021-12-27 21:42:42,834 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 [2021-12-27 21:42:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:42,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:42,907 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 [2021-12-27 21:42:45,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:45,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:45,283 INFO L353 Elim1Store]: treesize reduction 114, result has 42.1 percent of original size [2021-12-27 21:42:45,283 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 [2021-12-27 21:42:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:46,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 21:42:46,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:46,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 21:42:46,676 INFO L353 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-12-27 21:42:46,677 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 [2021-12-27 21:42:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-27 21:42:46,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:51,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:51,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50645075] [2021-12-27 21:42:51,709 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:51,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116778635] [2021-12-27 21:42:51,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116778635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:42:51,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:42:51,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-27 21:42:51,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610940607] [2021-12-27 21:42:51,709 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:51,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-27 21:42:51,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-27 21:42:51,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1069, Unknown=2, NotChecked=0, Total=1260 [2021-12-27 21:42:51,711 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) [2021-12-27 21:42:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:51,843 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2021-12-27 21:42:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-27 21:42:51,844 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 [2021-12-27 21:42:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:51,845 INFO L225 Difference]: With dead ends: 160 [2021-12-27 21:42:51,845 INFO L226 Difference]: Without dead ends: 156 [2021-12-27 21:42:51,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=196, Invalid=1134, Unknown=2, NotChecked=0, Total=1332 [2021-12-27 21:42:51,846 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 [2021-12-27 21:42:51,846 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] [2021-12-27 21:42:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-27 21:42:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2021-12-27 21:42:51,857 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) [2021-12-27 21:42:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 186 transitions. [2021-12-27 21:42:51,858 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 186 transitions. Word has length 50 [2021-12-27 21:42:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:51,858 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 186 transitions. [2021-12-27 21:42:51,858 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) [2021-12-27 21:42:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 186 transitions. [2021-12-27 21:42:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-27 21:42:51,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:51,860 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] [2021-12-27 21:42:51,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:52,076 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 [2021-12-27 21:42:52,077 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash -293138951, now seen corresponding path program 5 times [2021-12-27 21:42:52,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:52,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735502750] [2021-12-27 21:42:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:52,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:52,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:52,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685777717] [2021-12-27 21:42:52,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:42:52,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:52,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:52,117 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) [2021-12-27 21:42:52,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:42:52,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-27 21:42:52,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:52,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:42:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 21:42:52,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-27 21:42:52,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:52,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735502750] [2021-12-27 21:42:52,381 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:52,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685777717] [2021-12-27 21:42:52,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685777717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:52,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:52,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-27 21:42:52,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214578071] [2021-12-27 21:42:52,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:52,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 21:42:52,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 21:42:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:42:52,382 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) [2021-12-27 21:42:52,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:52,632 INFO L93 Difference]: Finished difference Result 330 states and 412 transitions. [2021-12-27 21:42:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-27 21:42:52,633 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 [2021-12-27 21:42:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:52,634 INFO L225 Difference]: With dead ends: 330 [2021-12-27 21:42:52,635 INFO L226 Difference]: Without dead ends: 252 [2021-12-27 21:42:52,635 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 [2021-12-27 21:42:52,636 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:52,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 212 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:42:52,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-27 21:42:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 218. [2021-12-27 21:42:52,650 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) [2021-12-27 21:42:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 279 transitions. [2021-12-27 21:42:52,651 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 279 transitions. Word has length 52 [2021-12-27 21:42:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:52,652 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 279 transitions. [2021-12-27 21:42:52,652 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) [2021-12-27 21:42:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 279 transitions. [2021-12-27 21:42:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-27 21:42:52,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:52,653 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] [2021-12-27 21:42:52,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-27 21:42:52,867 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 [2021-12-27 21:42:52,868 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 6 times [2021-12-27 21:42:52,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:52,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479859717] [2021-12-27 21:42:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:52,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:52,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:52,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161415132] [2021-12-27 21:42:52,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-27 21:42:52,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:52,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:52,904 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) [2021-12-27 21:42:52,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:42:53,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-27 21:42:53,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:53,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:42:53,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 21:42:53,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-27 21:42:53,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:53,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479859717] [2021-12-27 21:42:53,233 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:53,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161415132] [2021-12-27 21:42:53,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161415132] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:53,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:53,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-27 21:42:53,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355871332] [2021-12-27 21:42:53,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:53,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 21:42:53,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:53,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 21:42:53,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:42:53,235 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) [2021-12-27 21:42:53,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:53,598 INFO L93 Difference]: Finished difference Result 247 states and 306 transitions. [2021-12-27 21:42:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-27 21:42:53,599 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 [2021-12-27 21:42:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:53,601 INFO L225 Difference]: With dead ends: 247 [2021-12-27 21:42:53,601 INFO L226 Difference]: Without dead ends: 243 [2021-12-27 21:42:53,601 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 [2021-12-27 21:42:53,602 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 [2021-12-27 21:42:53,602 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] [2021-12-27 21:42:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-27 21:42:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 223. [2021-12-27 21:42:53,615 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) [2021-12-27 21:42:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 283 transitions. [2021-12-27 21:42:53,616 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 283 transitions. Word has length 52 [2021-12-27 21:42:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:53,617 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 283 transitions. [2021-12-27 21:42:53,617 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) [2021-12-27 21:42:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 283 transitions. [2021-12-27 21:42:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-27 21:42:53,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:53,618 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] [2021-12-27 21:42:53,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:53,831 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 [2021-12-27 21:42:53,831 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 7 times [2021-12-27 21:42:53,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:53,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50325189] [2021-12-27 21:42:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:53,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:53,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:53,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911916488] [2021-12-27 21:42:53,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-27 21:42:53,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:53,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:53,849 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) [2021-12-27 21:42:53,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 21:42:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:53,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-27 21:42:53,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:53,987 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 [2021-12-27 21:42:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:54,013 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 [2021-12-27 21:42:54,017 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 [2021-12-27 21:42:54,021 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 [2021-12-27 21:42:54,025 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 [2021-12-27 21:42:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:54,102 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 [2021-12-27 21:42:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:54,210 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 [2021-12-27 21:42:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:59,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:59,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:59,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:59,088 INFO L353 Elim1Store]: treesize reduction 132, result has 39.7 percent of original size [2021-12-27 21:42:59,089 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 [2021-12-27 21:42:59,958 INFO L353 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-12-27 21:42:59,958 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 [2021-12-27 21:43:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-27 21:43:00,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:04,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:43:04,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50325189] [2021-12-27 21:43:04,693 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:43:04,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911916488] [2021-12-27 21:43:04,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911916488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:43:04,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:43:04,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-27 21:43:04,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874021463] [2021-12-27 21:43:04,694 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:04,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-27 21:43:04,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:43:04,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-27 21:43:04,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1102, Unknown=6, NotChecked=0, Total=1260 [2021-12-27 21:43:04,695 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) [2021-12-27 21:43:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:05,864 INFO L93 Difference]: Finished difference Result 266 states and 334 transitions. [2021-12-27 21:43:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-27 21:43:05,864 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 [2021-12-27 21:43:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:05,866 INFO L225 Difference]: With dead ends: 266 [2021-12-27 21:43:05,866 INFO L226 Difference]: Without dead ends: 262 [2021-12-27 21:43:05,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=197, Invalid=1519, Unknown=6, NotChecked=0, Total=1722 [2021-12-27 21:43:05,867 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:05,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 367 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 851 Invalid, 0 Unknown, 83 Unchecked, 0.9s Time] [2021-12-27 21:43:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-27 21:43:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-12-27 21:43:05,882 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) [2021-12-27 21:43:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 312 transitions. [2021-12-27 21:43:05,883 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 312 transitions. Word has length 54 [2021-12-27 21:43:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:05,883 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 312 transitions. [2021-12-27 21:43:05,884 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) [2021-12-27 21:43:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 312 transitions. [2021-12-27 21:43:05,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-27 21:43:05,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:05,884 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] [2021-12-27 21:43:05,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:06,099 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 [2021-12-27 21:43:06,099 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:06,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:06,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 8 times [2021-12-27 21:43:06,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:43:06,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651902538] [2021-12-27 21:43:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:06,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:43:06,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:43:06,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063678355] [2021-12-27 21:43:06,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:43:06,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:43:06,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:43:06,119 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) [2021-12-27 21:43:06,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-27 21:43:06,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:43:06,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:06,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-27 21:43:06,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 21:43:06,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-27 21:43:06,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:43:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651902538] [2021-12-27 21:43:06,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:43:06,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063678355] [2021-12-27 21:43:06,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063678355] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:06,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:06,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-27 21:43:06,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676781953] [2021-12-27 21:43:06,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:06,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-27 21:43:06,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:43:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-27 21:43:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:43:06,424 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) [2021-12-27 21:43:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:06,928 INFO L93 Difference]: Finished difference Result 544 states and 693 transitions. [2021-12-27 21:43:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-27 21:43:06,928 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 [2021-12-27 21:43:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:06,930 INFO L225 Difference]: With dead ends: 544 [2021-12-27 21:43:06,930 INFO L226 Difference]: Without dead ends: 393 [2021-12-27 21:43:06,931 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 [2021-12-27 21:43:06,932 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 292 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:06,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 306 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-27 21:43:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-27 21:43:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 338. [2021-12-27 21:43:06,958 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) [2021-12-27 21:43:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 437 transitions. [2021-12-27 21:43:06,959 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 437 transitions. Word has length 56 [2021-12-27 21:43:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:06,960 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 437 transitions. [2021-12-27 21:43:06,960 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) [2021-12-27 21:43:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 437 transitions. [2021-12-27 21:43:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-27 21:43:06,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:06,961 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] [2021-12-27 21:43:06,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:07,175 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 [2021-12-27 21:43:07,175 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525379, now seen corresponding path program 9 times [2021-12-27 21:43:07,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:43:07,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489515261] [2021-12-27 21:43:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:07,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:43:07,188 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:43:07,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417107524] [2021-12-27 21:43:07,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:43:07,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:43:07,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:43:07,190 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) [2021-12-27 21:43:07,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-27 21:43:07,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-27 21:43:07,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:07,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-27 21:43:07,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 21:43:07,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-27 21:43:07,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:43:07,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489515261] [2021-12-27 21:43:07,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:43:07,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417107524] [2021-12-27 21:43:07,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417107524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:07,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:07,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-27 21:43:07,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143560278] [2021-12-27 21:43:07,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:07,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-27 21:43:07,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:43:07,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-27 21:43:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:43:07,526 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) [2021-12-27 21:43:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:07,921 INFO L93 Difference]: Finished difference Result 372 states and 468 transitions. [2021-12-27 21:43:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-27 21:43:07,921 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 [2021-12-27 21:43:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:07,922 INFO L225 Difference]: With dead ends: 372 [2021-12-27 21:43:07,923 INFO L226 Difference]: Without dead ends: 368 [2021-12-27 21:43:07,923 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 [2021-12-27 21:43:07,923 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 125 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:07,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 310 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:43:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-27 21:43:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 340. [2021-12-27 21:43:07,945 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) [2021-12-27 21:43:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 439 transitions. [2021-12-27 21:43:07,946 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 439 transitions. Word has length 56 [2021-12-27 21:43:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:07,947 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 439 transitions. [2021-12-27 21:43:07,947 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) [2021-12-27 21:43:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 439 transitions. [2021-12-27 21:43:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-27 21:43:07,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:07,948 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] [2021-12-27 21:43:07,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-27 21:43:08,164 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 [2021-12-27 21:43:08,165 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:08,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:08,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 10 times [2021-12-27 21:43:08,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:43:08,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067425591] [2021-12-27 21:43:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:08,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:43:08,178 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:43:08,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820884800] [2021-12-27 21:43:08,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:43:08,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:43:08,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:43:08,179 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) [2021-12-27 21:43:08,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-27 21:43:08,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:43:08,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:08,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-27 21:43:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:08,384 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 [2021-12-27 21:43:08,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,407 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 [2021-12-27 21:43:08,410 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 [2021-12-27 21:43:08,413 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 [2021-12-27 21:43:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,474 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 [2021-12-27 21:43:08,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,566 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 [2021-12-27 21:43:08,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:08,678 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 [2021-12-27 21:43:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:10,614 INFO L353 Elim1Store]: treesize reduction 180, result has 39.4 percent of original size [2021-12-27 21:43:10,614 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 [2021-12-27 21:43:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:12,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 21:43:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:12,470 INFO L353 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-27 21:43:12,470 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 [2021-12-27 21:43:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 21:43:12,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:16,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:43:16,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067425591] [2021-12-27 21:43:16,471 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:43:16,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820884800] [2021-12-27 21:43:16,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820884800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:43:16,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:43:16,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-27 21:43:16,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569813935] [2021-12-27 21:43:16,471 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-27 21:43:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:43:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-27 21:43:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2286, Unknown=0, NotChecked=0, Total=2652 [2021-12-27 21:43:16,473 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) [2021-12-27 21:43:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:18,207 INFO L93 Difference]: Finished difference Result 382 states and 490 transitions. [2021-12-27 21:43:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-27 21:43:18,208 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 [2021-12-27 21:43:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:18,212 INFO L225 Difference]: With dead ends: 382 [2021-12-27 21:43:18,213 INFO L226 Difference]: Without dead ends: 378 [2021-12-27 21:43:18,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=434, Invalid=2758, Unknown=0, NotChecked=0, Total=3192 [2021-12-27 21:43:18,214 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:18,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 414 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1163 Invalid, 0 Unknown, 95 Unchecked, 1.1s Time] [2021-12-27 21:43:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-12-27 21:43:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 361. [2021-12-27 21:43:18,245 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) [2021-12-27 21:43:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 465 transitions. [2021-12-27 21:43:18,247 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 465 transitions. Word has length 58 [2021-12-27 21:43:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:18,247 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 465 transitions. [2021-12-27 21:43:18,247 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) [2021-12-27 21:43:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 465 transitions. [2021-12-27 21:43:18,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-27 21:43:18,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:18,248 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] [2021-12-27 21:43:18,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:18,463 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 [2021-12-27 21:43:18,463 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1400995841, now seen corresponding path program 11 times [2021-12-27 21:43:18,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:43:18,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967035075] [2021-12-27 21:43:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:18,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:43:18,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:43:18,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932132365] [2021-12-27 21:43:18,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:43:18,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:43:18,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:43:18,477 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) [2021-12-27 21:43:18,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-27 21:43:18,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-27 21:43:18,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:18,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 21:43:18,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 21:43:18,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-27 21:43:18,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:43:18,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967035075] [2021-12-27 21:43:18,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:43:18,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932132365] [2021-12-27 21:43:18,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932132365] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:18,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:18,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-12-27 21:43:18,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246634192] [2021-12-27 21:43:18,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:18,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-27 21:43:18,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:43:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-27 21:43:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-27 21:43:18,859 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) [2021-12-27 21:43:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:19,645 INFO L93 Difference]: Finished difference Result 849 states and 1100 transitions. [2021-12-27 21:43:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-27 21:43:19,645 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 [2021-12-27 21:43:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:19,647 INFO L225 Difference]: With dead ends: 849 [2021-12-27 21:43:19,647 INFO L226 Difference]: Without dead ends: 604 [2021-12-27 21:43:19,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-12-27 21:43:19,651 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 520 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:19,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 400 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-27 21:43:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-12-27 21:43:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 471. [2021-12-27 21:43:19,694 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) [2021-12-27 21:43:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 620 transitions. [2021-12-27 21:43:19,696 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 620 transitions. Word has length 60 [2021-12-27 21:43:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:19,696 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 620 transitions. [2021-12-27 21:43:19,696 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) [2021-12-27 21:43:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 620 transitions. [2021-12-27 21:43:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-27 21:43:19,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:19,697 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] [2021-12-27 21:43:19,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:19,911 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 [2021-12-27 21:43:19,911 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1599277695, now seen corresponding path program 12 times [2021-12-27 21:43:19,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:43:19,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844527523] [2021-12-27 21:43:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:19,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:43:19,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:43:19,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840301751] [2021-12-27 21:43:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-27 21:43:19,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:43:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:43:19,924 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) [2021-12-27 21:43:19,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-27 21:43:20,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-27 21:43:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:43:20,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-27 21:43:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-27 21:43:20,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:43:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-27 21:43:20,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:43:20,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844527523] [2021-12-27 21:43:20,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:43:20,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840301751] [2021-12-27 21:43:20,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840301751] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:43:20,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:43:20,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-12-27 21:43:20,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893748604] [2021-12-27 21:43:20,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:43:20,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-27 21:43:20,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:43:20,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-27 21:43:20,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-27 21:43:20,387 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) [2021-12-27 21:43:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:43:21,169 INFO L93 Difference]: Finished difference Result 523 states and 668 transitions. [2021-12-27 21:43:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-27 21:43:21,170 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 [2021-12-27 21:43:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:43:21,172 INFO L225 Difference]: With dead ends: 523 [2021-12-27 21:43:21,172 INFO L226 Difference]: Without dead ends: 519 [2021-12-27 21:43:21,172 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 [2021-12-27 21:43:21,173 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 126 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-12-27 21:43:21,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 646 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-27 21:43:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-27 21:43:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 473. [2021-12-27 21:43:21,219 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) [2021-12-27 21:43:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 622 transitions. [2021-12-27 21:43:21,221 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 622 transitions. Word has length 60 [2021-12-27 21:43:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:43:21,221 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 622 transitions. [2021-12-27 21:43:21,222 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) [2021-12-27 21:43:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 622 transitions. [2021-12-27 21:43:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-27 21:43:21,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:43:21,224 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] [2021-12-27 21:43:21,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-27 21:43:21,442 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 [2021-12-27 21:43:21,442 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:43:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:43:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash 745660931, now seen corresponding path program 13 times [2021-12-27 21:43:21,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:43:21,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792342529] [2021-12-27 21:43:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:43:21,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:43:21,454 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:43:21,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612594677] [2021-12-27 21:43:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-27 21:43:21,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:43:21,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:43:21,455 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) [2021-12-27 21:43:21,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-27 21:43:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:43:21,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-27 21:43:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:43:21,716 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 [2021-12-27 21:43:21,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:21,748 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 [2021-12-27 21:43:21,752 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 [2021-12-27 21:43:21,756 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 [2021-12-27 21:43:21,760 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 [2021-12-27 21:43:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:21,833 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 [2021-12-27 21:43:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:21,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:21,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:21,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:21,925 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 [2021-12-27 21:43:22,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,055 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 [2021-12-27 21:43:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:22,219 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 [2021-12-27 21:43:32,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:43:32,735 INFO L353 Elim1Store]: treesize reduction 228, result has 39.2 percent of original size [2021-12-27 21:43:32,735 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 [2021-12-27 21:43:35,870 INFO L353 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2021-12-27 21:43:35,871 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 [2021-12-27 21:43:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 16 proven. 66 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-27 21:43:35,972 INFO L328 TraceCheckSpWp]: Computing backward predicates...