./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ifeqn5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e5b1d71ba93ce7431f315c72529ea116ea643f5eb9195d392455a202e45b249 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 12:20:39,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 12:20:39,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 12:20:39,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 12:20:39,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 12:20:39,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 12:20:39,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 12:20:39,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 12:20:39,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 12:20:39,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 12:20:39,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 12:20:39,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 12:20:39,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 12:20:39,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 12:20:39,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 12:20:39,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 12:20:39,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 12:20:39,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 12:20:39,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 12:20:39,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 12:20:39,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 12:20:39,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 12:20:39,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 12:20:39,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 12:20:39,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 12:20:39,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 12:20:39,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 12:20:39,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 12:20:39,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 12:20:39,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 12:20:39,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 12:20:39,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 12:20:39,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 12:20:39,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 12:20:39,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 12:20:39,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 12:20:39,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 12:20:39,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 12:20:39,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 12:20:39,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 12:20:39,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 12:20:39,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 12:20:39,607 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 12:20:39,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 12:20:39,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 12:20:39,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 12:20:39,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 12:20:39,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 12:20:39,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 12:20:39,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 12:20:39,609 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 12:20:39,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 12:20:39,610 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 12:20:39,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 12:20:39,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 12:20:39,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 12:20:39,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 12:20:39,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 12:20:39,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 12:20:39,611 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 12:20:39,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 12:20:39,611 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 12:20:39,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 12:20:39,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 12:20:39,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 12:20:39,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 12:20:39,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 12:20:39,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 12:20:39,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 12:20:39,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 12:20:39,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 12:20:39,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 12:20:39,613 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 12:20:39,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 12:20:39,613 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 12:20:39,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 12:20:39,614 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 12:20:39,614 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e5b1d71ba93ce7431f315c72529ea116ea643f5eb9195d392455a202e45b249 [2023-02-18 12:20:39,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 12:20:39,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 12:20:39,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 12:20:39,829 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 12:20:39,830 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 12:20:39,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn5.c [2023-02-18 12:20:40,751 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 12:20:40,939 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 12:20:40,939 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn5.c [2023-02-18 12:20:40,944 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783510170/74bc23d697704bc0bcc1153930fc44c1/FLAG886029059 [2023-02-18 12:20:40,960 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783510170/74bc23d697704bc0bcc1153930fc44c1 [2023-02-18 12:20:40,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 12:20:40,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 12:20:40,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 12:20:40,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 12:20:40,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 12:20:40,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:20:40" (1/1) ... [2023-02-18 12:20:40,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3217e50d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:40, skipping insertion in model container [2023-02-18 12:20:40,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:20:40" (1/1) ... [2023-02-18 12:20:40,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 12:20:40,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 12:20:41,104 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn5.c[589,602] [2023-02-18 12:20:41,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 12:20:41,135 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 12:20:41,145 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn5.c[589,602] [2023-02-18 12:20:41,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 12:20:41,169 INFO L208 MainTranslator]: Completed translation [2023-02-18 12:20:41,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41 WrapperNode [2023-02-18 12:20:41,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 12:20:41,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 12:20:41,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 12:20:41,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 12:20:41,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,205 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-02-18 12:20:41,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 12:20:41,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 12:20:41,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 12:20:41,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 12:20:41,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,233 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 12:20:41,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 12:20:41,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 12:20:41,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 12:20:41,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (1/1) ... [2023-02-18 12:20:41,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 12:20:41,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:41,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 12:20:41,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 12:20:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 12:20:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 12:20:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 12:20:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 12:20:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 12:20:41,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 12:20:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 12:20:41,370 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 12:20:41,371 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 12:20:41,538 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 12:20:41,543 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 12:20:41,543 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 12:20:41,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:20:41 BoogieIcfgContainer [2023-02-18 12:20:41,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 12:20:41,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 12:20:41,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 12:20:41,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 12:20:41,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:20:40" (1/3) ... [2023-02-18 12:20:41,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f6440e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:20:41, skipping insertion in model container [2023-02-18 12:20:41,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:20:41" (2/3) ... [2023-02-18 12:20:41,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f6440e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:20:41, skipping insertion in model container [2023-02-18 12:20:41,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:20:41" (3/3) ... [2023-02-18 12:20:41,550 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn5.c [2023-02-18 12:20:41,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 12:20:41,562 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 12:20:41,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 12:20:41,594 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69b1f86c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 12:20:41,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 12:20:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 12:20:41,600 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:41,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:41,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2023-02-18 12:20:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:41,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357770855] [2023-02-18 12:20:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:41,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:41,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357770855] [2023-02-18 12:20:41,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 12:20:41,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349261980] [2023-02-18 12:20:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:41,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:41,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:41,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 12:20:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 12:20:41,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:20:41,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:20:41,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349261980] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:20:41,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:20:41,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 12:20:41,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638714539] [2023-02-18 12:20:41,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:20:41,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 12:20:41,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 12:20:41,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 12:20:41,852 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:41,862 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-02-18 12:20:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 12:20:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 12:20:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:41,868 INFO L225 Difference]: With dead ends: 42 [2023-02-18 12:20:41,868 INFO L226 Difference]: Without dead ends: 19 [2023-02-18 12:20:41,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 12:20:41,871 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:41,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:20:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-18 12:20:41,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-18 12:20:41,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-18 12:20:41,900 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-18 12:20:41,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:41,900 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-18 12:20:41,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:41,901 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-18 12:20:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 12:20:41,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:41,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:41,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 12:20:42,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 12:20:42,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:42,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2023-02-18 12:20:42,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:42,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472014749] [2023-02-18 12:20:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:42,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:42,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:42,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472014749] [2023-02-18 12:20:42,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 12:20:42,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221209843] [2023-02-18 12:20:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:42,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:42,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:42,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:42,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 12:20:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:42,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 12:20:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:20:42,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:20:42,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221209843] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:20:42,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:20:42,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 12:20:42,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850985138] [2023-02-18 12:20:42,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:20:42,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 12:20:42,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:42,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 12:20:42,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 12:20:42,278 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:42,334 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-18 12:20:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 12:20:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 12:20:42,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:42,340 INFO L225 Difference]: With dead ends: 42 [2023-02-18 12:20:42,340 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 12:20:42,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 12:20:42,341 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:42,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:20:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 12:20:42,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-02-18 12:20:42,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-18 12:20:42,350 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-02-18 12:20:42,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:42,350 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-18 12:20:42,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-18 12:20:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 12:20:42,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:42,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:42,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 12:20:42,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-18 12:20:42,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:42,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:42,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2023-02-18 12:20:42,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:42,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699046206] [2023-02-18 12:20:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:42,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:42,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:20:42,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182054780] [2023-02-18 12:20:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:42,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:42,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:42,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:42,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 12:20:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:42,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 12:20:42,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:42,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 12:20:42,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:20:42,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 23 [2023-02-18 12:20:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:20:42,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:20:42,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:42,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699046206] [2023-02-18 12:20:42,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:20:42,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182054780] [2023-02-18 12:20:42,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182054780] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:20:42,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:20:42,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 12:20:42,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023613923] [2023-02-18 12:20:42,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:20:42,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 12:20:42,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 12:20:42,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 12:20:42,708 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:42,774 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-02-18 12:20:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 12:20:42,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 12:20:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:42,777 INFO L225 Difference]: With dead ends: 38 [2023-02-18 12:20:42,777 INFO L226 Difference]: Without dead ends: 36 [2023-02-18 12:20:42,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-18 12:20:42,780 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:42,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 63 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:20:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-18 12:20:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2023-02-18 12:20:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-18 12:20:42,784 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2023-02-18 12:20:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:42,784 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-18 12:20:42,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-18 12:20:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 12:20:42,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:42,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:42,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 12:20:42,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:42,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2023-02-18 12:20:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:42,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079570754] [2023-02-18 12:20:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:42,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:43,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:43,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079570754] [2023-02-18 12:20:43,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 12:20:43,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716637350] [2023-02-18 12:20:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:43,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:43,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:43,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 12:20:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:43,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 12:20:43,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:20:43,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 12:20:43,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716637350] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:20:43,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:20:43,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 12:20:43,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91750779] [2023-02-18 12:20:43,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:20:43,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 12:20:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:43,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 12:20:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 12:20:43,110 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:43,144 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-18 12:20:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 12:20:43,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 12:20:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:43,149 INFO L225 Difference]: With dead ends: 55 [2023-02-18 12:20:43,150 INFO L226 Difference]: Without dead ends: 35 [2023-02-18 12:20:43,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 12:20:43,152 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:43,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:20:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-18 12:20:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-02-18 12:20:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-18 12:20:43,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2023-02-18 12:20:43,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:43,162 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-18 12:20:43,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-18 12:20:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 12:20:43,163 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:43,163 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:43,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 12:20:43,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:43,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2023-02-18 12:20:43,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:43,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254670250] [2023-02-18 12:20:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:43,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:43,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:20:43,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109069199] [2023-02-18 12:20:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:43,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:43,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:43,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:43,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 12:20:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:43,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 12:20:43,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:20:43,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:20:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:20:43,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:43,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254670250] [2023-02-18 12:20:43,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:20:43,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109069199] [2023-02-18 12:20:43,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109069199] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:20:43,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:20:43,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-18 12:20:43,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565147189] [2023-02-18 12:20:43,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:20:43,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 12:20:43,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:43,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 12:20:43,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-18 12:20:43,477 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:43,572 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-02-18 12:20:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 12:20:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-18 12:20:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:43,573 INFO L225 Difference]: With dead ends: 70 [2023-02-18 12:20:43,573 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 12:20:43,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-18 12:20:43,574 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:43,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 38 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:20:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 12:20:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2023-02-18 12:20:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-02-18 12:20:43,577 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2023-02-18 12:20:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:43,578 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-02-18 12:20:43,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-02-18 12:20:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 12:20:43,578 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:43,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:43,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 12:20:43,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:43,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:43,794 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2023-02-18 12:20:43,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:43,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491310568] [2023-02-18 12:20:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:43,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:43,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:20:43,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583110877] [2023-02-18 12:20:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:43,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:43,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:43,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:43,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 12:20:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 12:20:43,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:43,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 12:20:43,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2023-02-18 12:20:43,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:43,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:43,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 87 [2023-02-18 12:20:43,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:43,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:43,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 20 [2023-02-18 12:20:43,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:20:43,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 23 [2023-02-18 12:20:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:20:43,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:20:44,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-02-18 12:20:44,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2023-02-18 12:20:44,111 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:44,114 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:20:44,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:44,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491310568] [2023-02-18 12:20:44,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:20:44,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583110877] [2023-02-18 12:20:44,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583110877] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:20:44,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:20:44,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-02-18 12:20:44,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337773823] [2023-02-18 12:20:44,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:20:44,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 12:20:44,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 12:20:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-18 12:20:44,130 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:44,485 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2023-02-18 12:20:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 12:20:44,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 12:20:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:44,486 INFO L225 Difference]: With dead ends: 112 [2023-02-18 12:20:44,486 INFO L226 Difference]: Without dead ends: 92 [2023-02-18 12:20:44,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-02-18 12:20:44,487 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 214 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:44,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 101 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 12:20:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-18 12:20:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2023-02-18 12:20:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-18 12:20:44,494 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2023-02-18 12:20:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:44,494 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-18 12:20:44,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-18 12:20:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 12:20:44,495 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:44,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:44,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 12:20:44,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:44,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2023-02-18 12:20:44,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:44,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516512630] [2023-02-18 12:20:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:44,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:44,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:20:44,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406231929] [2023-02-18 12:20:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:44,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:44,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:44,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:44,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 12:20:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:20:44,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-18 12:20:44,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:44,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-18 12:20:44,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 12:20:44,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2023-02-18 12:20:44,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:44,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:44,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 87 [2023-02-18 12:20:44,833 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:20:44,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-18 12:20:44,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 101 [2023-02-18 12:20:44,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:44,868 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:44,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:44,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 147 [2023-02-18 12:20:44,880 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:20:44,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:20:44,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 128 treesize of output 105 [2023-02-18 12:20:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:20:45,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:20:45,655 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,657 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:45,658 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,659 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,661 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:45,661 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:45,662 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,664 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:45,664 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:45,665 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,667 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,669 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:45,669 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:45,671 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,676 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,677 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,679 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:45,680 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,681 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,683 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:45,684 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-18 12:20:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:20:45,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516512630] [2023-02-18 12:20:45,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:20:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406231929] [2023-02-18 12:20:45,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406231929] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:20:45,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:20:45,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-02-18 12:20:45,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750295639] [2023-02-18 12:20:45,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:20:45,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 12:20:45,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:45,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 12:20:45,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-02-18 12:20:45,726 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:52,805 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2023-02-18 12:20:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-18 12:20:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-18 12:20:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:52,810 INFO L225 Difference]: With dead ends: 175 [2023-02-18 12:20:52,810 INFO L226 Difference]: Without dead ends: 173 [2023-02-18 12:20:52,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=683, Invalid=2287, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 12:20:52,812 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 377 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:52,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 197 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-02-18 12:20:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-18 12:20:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2023-02-18 12:20:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-02-18 12:20:52,855 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 28 [2023-02-18 12:20:52,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:52,855 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-02-18 12:20:52,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:52,855 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-02-18 12:20:52,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 12:20:52,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:52,856 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:52,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 12:20:53,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:53,062 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2023-02-18 12:20:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:53,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027367154] [2023-02-18 12:20:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:53,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:53,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:20:53,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850647388] [2023-02-18 12:20:53,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 12:20:53,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:53,109 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:53,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 12:20:53,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 12:20:53,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:20:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 12:20:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:20:53,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:20:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:20:53,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:53,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027367154] [2023-02-18 12:20:53,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:20:53,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850647388] [2023-02-18 12:20:53,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850647388] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:20:53,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:20:53,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-18 12:20:53,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967933410] [2023-02-18 12:20:53,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:20:53,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 12:20:53,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:53,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 12:20:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-18 12:20:53,223 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:53,365 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2023-02-18 12:20:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 12:20:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 12:20:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:53,367 INFO L225 Difference]: With dead ends: 190 [2023-02-18 12:20:53,367 INFO L226 Difference]: Without dead ends: 122 [2023-02-18 12:20:53,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-18 12:20:53,368 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:53,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 65 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:20:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-18 12:20:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2023-02-18 12:20:53,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.21875) internal successors, (117), 96 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2023-02-18 12:20:53,390 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 32 [2023-02-18 12:20:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:53,390 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2023-02-18 12:20:53,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2023-02-18 12:20:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 12:20:53,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:53,391 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:53,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 12:20:53,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 12:20:53,597 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2023-02-18 12:20:53,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:53,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296255474] [2023-02-18 12:20:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:53,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:20:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112029216] [2023-02-18 12:20:53,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 12:20:53,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:53,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:53,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:53,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 12:20:53,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 12:20:53,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:20:53,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 12:20:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 12:20:53,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:20:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 12:20:53,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:53,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296255474] [2023-02-18 12:20:53,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:20:53,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112029216] [2023-02-18 12:20:53,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112029216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:20:53,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:20:53,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-18 12:20:53,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811660801] [2023-02-18 12:20:53,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:20:53,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 12:20:53,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:53,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 12:20:53,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-18 12:20:53,743 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:53,985 INFO L93 Difference]: Finished difference Result 236 states and 273 transitions. [2023-02-18 12:20:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 12:20:53,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-18 12:20:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:53,987 INFO L225 Difference]: With dead ends: 236 [2023-02-18 12:20:53,987 INFO L226 Difference]: Without dead ends: 177 [2023-02-18 12:20:53,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-18 12:20:53,990 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 117 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:53,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 112 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 12:20:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-18 12:20:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2023-02-18 12:20:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 133 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2023-02-18 12:20:54,032 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 36 [2023-02-18 12:20:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:54,032 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2023-02-18 12:20:54,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2023-02-18 12:20:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 12:20:54,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:54,033 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:54,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 12:20:54,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:54,239 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2023-02-18 12:20:54,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:54,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284624853] [2023-02-18 12:20:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:54,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:54,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:20:54,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131016344] [2023-02-18 12:20:54,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 12:20:54,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:54,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:54,280 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:54,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 12:20:54,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 12:20:54,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:20:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 12:20:54,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 12:20:54,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:20:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 12:20:54,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:20:54,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284624853] [2023-02-18 12:20:54,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 12:20:54,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131016344] [2023-02-18 12:20:54,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131016344] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:20:54,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 12:20:54,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-02-18 12:20:54,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823372424] [2023-02-18 12:20:54,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 12:20:54,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 12:20:54,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:20:54,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 12:20:54,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-02-18 12:20:54,497 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:20:54,836 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2023-02-18 12:20:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-18 12:20:54,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-18 12:20:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:20:54,837 INFO L225 Difference]: With dead ends: 171 [2023-02-18 12:20:54,837 INFO L226 Difference]: Without dead ends: 162 [2023-02-18 12:20:54,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 12:20:54,839 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 113 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 12:20:54,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 99 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 12:20:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-18 12:20:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2023-02-18 12:20:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 133 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-02-18 12:20:54,898 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 37 [2023-02-18 12:20:54,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:20:54,900 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-02-18 12:20:54,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:20:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-02-18 12:20:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 12:20:54,904 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:20:54,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:20:54,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 12:20:55,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 12:20:55,110 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:20:55,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:20:55,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2023-02-18 12:20:55,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:20:55,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766010821] [2023-02-18 12:20:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:20:55,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:20:55,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 12:20:55,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430510369] [2023-02-18 12:20:55,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 12:20:55,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:20:55,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:20:55,150 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 12:20:55,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 12:20:55,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 12:20:55,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:20:55,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-18 12:20:55,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:20:55,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-18 12:20:55,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 12:20:55,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2023-02-18 12:20:55,354 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:55,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 177 [2023-02-18 12:20:55,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:55,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 91 [2023-02-18 12:20:55,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 171 [2023-02-18 12:20:55,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 213 [2023-02-18 12:20:55,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 152 [2023-02-18 12:20:55,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 332 treesize of output 184 [2023-02-18 12:20:55,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 458 treesize of output 404 [2023-02-18 12:20:55,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:55,491 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:20:55,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:55,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:20:55,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 203 [2023-02-18 12:20:55,514 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-18 12:20:55,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 502 treesize of output 436 [2023-02-18 12:20:55,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 233 [2023-02-18 12:20:55,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 180 [2023-02-18 12:20:57,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:20:57,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 214 select indices, 214 select index equivalence classes, 15 disjoint index pairs (out of 22791 index pairs), introduced 214 new quantified variables, introduced 22791 case distinctions, treesize of input 7173 treesize of output 46931