./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-crafted/zero_sum_const3.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 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:56:30,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:56:30,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:56:30,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:56:30,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:56:30,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:56:30,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:56:30,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:56:30,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:56:30,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:56:30,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:56:30,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:56:30,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:56:30,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:56:30,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:56:30,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:56:30,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:56:30,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:56:30,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:56:30,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:56:30,427 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:56:30,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:56:30,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:56:30,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:56:30,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:56:30,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:56:30,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:56:30,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:56:30,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:56:30,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:56:30,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:56:30,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:56:30,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:56:30,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:56:30,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:56:30,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:56:30,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:56:30,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:56:30,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:56:30,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:56:30,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:56:30,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:56:30,443 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:56:30,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:56:30,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:56:30,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:56:30,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:56:30,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:56:30,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:56:30,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:56:30,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:56:30,467 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:56:30,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:56:30,468 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:56:30,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:56:30,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:56:30,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:56:30,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:56:30,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:56:30,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:56:30,469 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:56:30,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:56:30,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:56:30,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:56:30,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:56:30,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:56:30,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:56:30,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:56:30,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:56:30,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:56:30,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:56:30,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:56:30,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:56:30,471 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:56:30,471 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:56:30,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:56:30,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 [2022-07-19 09:56:30,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:56:30,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:56:30,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:56:30,664 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:56:30,665 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:56:30,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const3.c [2022-07-19 09:56:30,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd84204b6/995a4fb94b954537a1551a84c1920bb1/FLAG93bade74a [2022-07-19 09:56:31,078 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:56:31,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c [2022-07-19 09:56:31,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd84204b6/995a4fb94b954537a1551a84c1920bb1/FLAG93bade74a [2022-07-19 09:56:31,091 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd84204b6/995a4fb94b954537a1551a84c1920bb1 [2022-07-19 09:56:31,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:56:31,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:56:31,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:56:31,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:56:31,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:56:31,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502e1f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31, skipping insertion in model container [2022-07-19 09:56:31,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:56:31,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:56:31,216 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c[406,419] [2022-07-19 09:56:31,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:56:31,236 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:56:31,243 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const3.c[406,419] [2022-07-19 09:56:31,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:56:31,258 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:56:31,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31 WrapperNode [2022-07-19 09:56:31,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:56:31,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:56:31,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:56:31,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:56:31,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,295 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 104 [2022-07-19 09:56:31,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:56:31,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:56:31,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:56:31,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:56:31,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:56:31,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:56:31,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:56:31,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:56:31,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (1/1) ... [2022-07-19 09:56:31,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:56:31,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:56:31,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 09:56:31,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 09:56:31,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:56:31,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:56:31,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:56:31,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 09:56:31,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:56:31,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:56:31,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:56:31,416 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:56:31,417 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:56:31,517 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:56:31,521 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:56:31,521 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-19 09:56:31,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:56:31 BoogieIcfgContainer [2022-07-19 09:56:31,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:56:31,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:56:31,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:56:31,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:56:31,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:56:31" (1/3) ... [2022-07-19 09:56:31,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598dd4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:56:31, skipping insertion in model container [2022-07-19 09:56:31,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:56:31" (2/3) ... [2022-07-19 09:56:31,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@598dd4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:56:31, skipping insertion in model container [2022-07-19 09:56:31,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:56:31" (3/3) ... [2022-07-19 09:56:31,536 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2022-07-19 09:56:31,555 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:56:31,555 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:56:31,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:56:31,624 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37c84832, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@364cc4b5 [2022-07-19 09:56:31,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:56:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 09:56:31,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:56:31,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:56:31,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:56:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:56:31,637 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2022-07-19 09:56:31,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:56:31,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405456713] [2022-07-19 09:56:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:31,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:56:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:56:31,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:56:31,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405456713] [2022-07-19 09:56:31,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405456713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:56:31,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:56:31,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:56:31,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045298867] [2022-07-19 09:56:31,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:56:31,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:56:31,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:56:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:56:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:56:31,814 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 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) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:56:31,830 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2022-07-19 09:56:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:56:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2022-07-19 09:56:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:56:31,839 INFO L225 Difference]: With dead ends: 59 [2022-07-19 09:56:31,839 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 09:56:31,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:56:31,846 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:56:31,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:56:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 09:56:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-19 09:56:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-19 09:56:31,874 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2022-07-19 09:56:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:56:31,875 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-19 09:56:31,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:31,876 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-19 09:56:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 09:56:31,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:56:31,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:56:31,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:56:31,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:56:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:56:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2022-07-19 09:56:31,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:56:31,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796535649] [2022-07-19 09:56:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:31,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:56:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:56:31,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:56:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796535649] [2022-07-19 09:56:31,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796535649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:56:31,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:56:31,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:56:31,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914026675] [2022-07-19 09:56:31,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:56:31,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:56:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:56:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:56:31,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:56:31,970 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:56:32,033 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-07-19 09:56:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:56:32,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2022-07-19 09:56:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:56:32,035 INFO L225 Difference]: With dead ends: 51 [2022-07-19 09:56:32,035 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 09:56:32,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:56:32,040 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:56:32,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:56:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 09:56:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-19 09:56:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-19 09:56:32,049 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2022-07-19 09:56:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:56:32,049 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-19 09:56:32,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-19 09:56:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 09:56:32,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:56:32,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:56:32,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:56:32,052 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:56:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:56:32,052 INFO L85 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2022-07-19 09:56:32,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:56:32,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319075267] [2022-07-19 09:56:32,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:32,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:56:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:56:32,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:56:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319075267] [2022-07-19 09:56:32,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319075267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:56:32,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:56:32,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 09:56:32,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267982011] [2022-07-19 09:56:32,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:56:32,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:56:32,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:56:32,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:56:32,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:56:32,086 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:56:32,163 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2022-07-19 09:56:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 09:56:32,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 09:56:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:56:32,165 INFO L225 Difference]: With dead ends: 60 [2022-07-19 09:56:32,165 INFO L226 Difference]: Without dead ends: 41 [2022-07-19 09:56:32,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:56:32,172 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:56:32,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 15 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:56:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-19 09:56:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-07-19 09:56:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-07-19 09:56:32,197 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2022-07-19 09:56:32,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:56:32,197 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-07-19 09:56:32,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-07-19 09:56:32,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 09:56:32,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:56:32,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:56:32,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 09:56:32,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:56:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:56:32,199 INFO L85 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2022-07-19 09:56:32,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:56:32,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909710702] [2022-07-19 09:56:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:32,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:56:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 09:56:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:56:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909710702] [2022-07-19 09:56:32,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909710702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:56:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95382248] [2022-07-19 09:56:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:32,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:56:32,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:56:32,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:56:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:32,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:56:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:56:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 09:56:32,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:56:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 09:56:32,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95382248] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:56:32,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:56:32,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 09:56:32,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325320314] [2022-07-19 09:56:32,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:56:32,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 09:56:32,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:56:32,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 09:56:32,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:56:32,431 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:56:32,504 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-07-19 09:56:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:56:32,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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 33 [2022-07-19 09:56:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:56:32,506 INFO L225 Difference]: With dead ends: 65 [2022-07-19 09:56:32,506 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 09:56:32,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:56:32,512 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:56:32,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:56:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 09:56:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-07-19 09:56:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-07-19 09:56:32,516 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2022-07-19 09:56:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:56:32,516 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-07-19 09:56:32,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-07-19 09:56:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 09:56:32,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:56:32,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:56:32,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:56:32,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:32,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:56:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:56:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2022-07-19 09:56:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:56:32,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337153596] [2022-07-19 09:56:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:32,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:56:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:56:32,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:56:32,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337153596] [2022-07-19 09:56:32,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337153596] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:56:32,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13660436] [2022-07-19 09:56:32,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:56:32,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:56:32,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:56:32,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:56:32,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:56:32,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:56:32,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:56:32,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:56:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:56:32,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:56:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:56:32,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13660436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:56:32,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:56:32,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-19 09:56:32,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108024734] [2022-07-19 09:56:32,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:56:32,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 09:56:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:56:32,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 09:56:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-19 09:56:32,939 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:56:33,030 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-07-19 09:56:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 09:56:33,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 35 [2022-07-19 09:56:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:56:33,031 INFO L225 Difference]: With dead ends: 79 [2022-07-19 09:56:33,032 INFO L226 Difference]: Without dead ends: 55 [2022-07-19 09:56:33,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-19 09:56:33,033 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:56:33,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 18 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:56:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-19 09:56:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-07-19 09:56:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-07-19 09:56:33,044 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2022-07-19 09:56:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:56:33,044 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-07-19 09:56:33,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-07-19 09:56:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 09:56:33,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:56:33,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:56:33,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:56:33,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:33,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:56:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:56:33,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2022-07-19 09:56:33,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:56:33,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41060484] [2022-07-19 09:56:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:33,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:56:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:56:34,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:56:34,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41060484] [2022-07-19 09:56:34,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41060484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:56:34,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153299019] [2022-07-19 09:56:34,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:56:34,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:34,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:56:34,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:56:34,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:56:34,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:56:34,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:56:34,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-19 09:56:34,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:56:35,128 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:56:35,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-07-19 09:56:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:56:35,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:56:39,689 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:56:39,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 93 [2022-07-19 09:56:39,866 INFO L356 Elim1Store]: treesize reduction 40, result has 52.9 percent of original size [2022-07-19 09:56:39,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 54 [2022-07-19 09:56:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:56:40,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153299019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:56:40,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:56:40,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 26] total 58 [2022-07-19 09:56:40,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025371648] [2022-07-19 09:56:40,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:56:40,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-19 09:56:40,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:56:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-19 09:56:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2952, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 09:56:40,585 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:56:42,009 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2022-07-19 09:56:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 09:56:42,010 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 58 states have internal predecessors, (133), 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 47 [2022-07-19 09:56:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:56:42,011 INFO L225 Difference]: With dead ends: 132 [2022-07-19 09:56:42,011 INFO L226 Difference]: Without dead ends: 126 [2022-07-19 09:56:42,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 51 SyntacticMatches, 27 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=788, Invalid=6184, Unknown=0, NotChecked=0, Total=6972 [2022-07-19 09:56:42,014 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 599 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:56:42,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 93 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 328 Invalid, 0 Unknown, 599 Unchecked, 0.2s Time] [2022-07-19 09:56:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-19 09:56:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 87. [2022-07-19 09:56:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 86 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) [2022-07-19 09:56:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2022-07-19 09:56:42,036 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 47 [2022-07-19 09:56:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:56:42,036 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2022-07-19 09:56:42,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.293103448275862) internal successors, (133), 58 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2022-07-19 09:56:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 09:56:42,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:56:42,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:56:42,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:56:42,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:42,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:56:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:56:42,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2022-07-19 09:56:42,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:56:42,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064523778] [2022-07-19 09:56:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:42,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:56:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 09:56:42,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:56:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064523778] [2022-07-19 09:56:42,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064523778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:56:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173958931] [2022-07-19 09:56:42,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:56:42,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:56:42,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:56:42,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:56:42,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:56:42,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:56:42,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:56:42,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:56:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 09:56:42,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:56:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 09:56:42,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173958931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:56:42,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:56:42,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 09:56:42,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63344089] [2022-07-19 09:56:42,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:56:42,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:56:42,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:56:42,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:56:42,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:56:42,519 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2022-07-19 09:56:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:56:42,698 INFO L93 Difference]: Finished difference Result 193 states and 222 transitions. [2022-07-19 09:56:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 09:56:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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 49 [2022-07-19 09:56:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:56:42,701 INFO L225 Difference]: With dead ends: 193 [2022-07-19 09:56:42,701 INFO L226 Difference]: Without dead ends: 120 [2022-07-19 09:56:42,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:56:42,703 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 161 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:56:42,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 32 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:56:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-19 09:56:42,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2022-07-19 09:56:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 99 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2022-07-19 09:56:42,710 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 49 [2022-07-19 09:56:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:56:42,710 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2022-07-19 09:56:42,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2022-07-19 09:56:42,711 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2022-07-19 09:56:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 09:56:42,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:56:42,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:56:42,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 09:56:42,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:42,918 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:56:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:56:42,919 INFO L85 PathProgramCache]: Analyzing trace with hash -925733540, now seen corresponding path program 5 times [2022-07-19 09:56:42,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:56:42,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987608659] [2022-07-19 09:56:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:42,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:56:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 09:56:42,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:56:42,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987608659] [2022-07-19 09:56:42,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987608659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:56:42,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382161005] [2022-07-19 09:56:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:56:42,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:56:42,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:56:42,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:56:43,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 09:56:43,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:56:43,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:56:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:56:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 09:56:43,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:56:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 09:56:43,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382161005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:56:43,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:56:43,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 09:56:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955605757] [2022-07-19 09:56:43,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:56:43,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:56:43,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:56:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:56:43,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:56:43,130 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:56:43,307 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2022-07-19 09:56:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 09:56:43,308 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 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 51 [2022-07-19 09:56:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:56:43,308 INFO L225 Difference]: With dead ends: 112 [2022-07-19 09:56:43,308 INFO L226 Difference]: Without dead ends: 78 [2022-07-19 09:56:43,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:56:43,309 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:56:43,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 23 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:56:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-19 09:56:43,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2022-07-19 09:56:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-07-19 09:56:43,314 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2022-07-19 09:56:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:56:43,314 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-07-19 09:56:43,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:56:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-07-19 09:56:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 09:56:43,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:56:43,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:56:43,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 09:56:43,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:43,530 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:56:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:56:43,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2022-07-19 09:56:43,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:56:43,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015665203] [2022-07-19 09:56:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:56:43,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:56:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:56:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:56:45,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:56:45,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015665203] [2022-07-19 09:56:45,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015665203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:56:45,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346419847] [2022-07-19 09:56:45,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:56:45,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:56:45,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:56:45,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:56:45,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:56:46,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 09:56:46,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:56:46,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-19 09:56:46,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:56:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:56:49,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:56:49,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:56:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:56:49,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:56:49,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:56:49,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:56:49,021 INFO L356 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2022-07-19 09:56:49,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 28 [2022-07-19 09:56:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:56:49,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:59,644 INFO L356 Elim1Store]: treesize reduction 185, result has 55.3 percent of original size [2022-07-19 09:57:59,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 245 [2022-07-19 09:58:01,350 INFO L356 Elim1Store]: treesize reduction 393, result has 5.1 percent of original size [2022-07-19 09:58:01,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 38 [2022-07-19 09:58:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:58:01,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346419847] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:01,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:01,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 40] total 121 [2022-07-19 09:58:01,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616642379] [2022-07-19 09:58:01,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-07-19 09:58:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-07-19 09:58:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=13570, Unknown=20, NotChecked=0, Total=14520 [2022-07-19 09:58:01,843 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 121 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:07,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:07,627 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2022-07-19 09:58:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-19 09:58:07,628 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 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 61 [2022-07-19 09:58:07,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:07,628 INFO L225 Difference]: With dead ends: 114 [2022-07-19 09:58:07,629 INFO L226 Difference]: Without dead ends: 110 [2022-07-19 09:58:07,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 43 SyntacticMatches, 13 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8945 ImplicationChecksByTransitivity, 78.7s TimeCoverageRelationStatistics Valid=1929, Invalid=26781, Unknown=20, NotChecked=0, Total=28730 [2022-07-19 09:58:07,634 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1388 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:07,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 160 Invalid, 2931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1347 Invalid, 0 Unknown, 1388 Unchecked, 0.8s Time] [2022-07-19 09:58:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-19 09:58:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2022-07-19 09:58:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2022-07-19 09:58:07,641 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 61 [2022-07-19 09:58:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:07,642 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2022-07-19 09:58:07,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2022-07-19 09:58:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 09:58:07,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:07,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:58:07,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:58:07,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:07,860 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:07,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:07,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2022-07-19 09:58:07,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:07,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867029641] [2022-07-19 09:58:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:07,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:58:07,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867029641] [2022-07-19 09:58:07,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867029641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311937134] [2022-07-19 09:58:07,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:58:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:07,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:58:07,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:58:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:08,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 09:58:08,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:58:08,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:58:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311937134] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:08,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:08,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 09:58:08,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733290920] [2022-07-19 09:58:08,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:08,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:58:08,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:58:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:58:08,180 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:08,468 INFO L93 Difference]: Finished difference Result 221 states and 246 transitions. [2022-07-19 09:58:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 09:58:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 63 [2022-07-19 09:58:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:08,469 INFO L225 Difference]: With dead ends: 221 [2022-07-19 09:58:08,470 INFO L226 Difference]: Without dead ends: 126 [2022-07-19 09:58:08,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-19 09:58:08,471 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:08,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 42 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:58:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-19 09:58:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2022-07-19 09:58:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 105 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2022-07-19 09:58:08,478 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 63 [2022-07-19 09:58:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:08,478 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2022-07-19 09:58:08,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2022-07-19 09:58:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 09:58:08,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:08,479 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:58:08,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:58:08,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:08,701 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 156775434, now seen corresponding path program 8 times [2022-07-19 09:58:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:08,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338088490] [2022-07-19 09:58:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:08,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-19 09:58:08,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:08,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338088490] [2022-07-19 09:58:08,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338088490] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:08,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505082559] [2022-07-19 09:58:08,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:58:08,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:08,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:58:08,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:58:08,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:58:08,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:58:08,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 09:58:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-19 09:58:08,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-19 09:58:08,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505082559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:08,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:08,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 09:58:08,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248401188] [2022-07-19 09:58:08,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:08,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:58:08,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:58:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:58:08,971 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:09,225 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2022-07-19 09:58:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 09:58:09,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 65 [2022-07-19 09:58:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:09,227 INFO L225 Difference]: With dead ends: 118 [2022-07-19 09:58:09,227 INFO L226 Difference]: Without dead ends: 82 [2022-07-19 09:58:09,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:58:09,227 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:09,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 20 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:58:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-19 09:58:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-07-19 09:58:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-07-19 09:58:09,233 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2022-07-19 09:58:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:09,233 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-07-19 09:58:09,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-07-19 09:58:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-19 09:58:09,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:09,234 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:58:09,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:58:09,451 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,SelfDestructingSolverStorable10 [2022-07-19 09:58:09,451 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2022-07-19 09:58:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:09,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881469378] [2022-07-19 09:58:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:58:13,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881469378] [2022-07-19 09:58:13,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881469378] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701079875] [2022-07-19 09:58:13,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:58:13,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:13,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:13,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:58:13,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 09:58:13,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 09:58:13,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:58:13,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-19 09:58:13,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:13,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:58:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:58:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:58:22,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:58:22,905 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:58:22,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 53 [2022-07-19 09:58:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 103 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:58:23,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:58:29,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701079875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:29,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:29,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 26, 21] total 103 [2022-07-19 09:58:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451303572] [2022-07-19 09:58:29,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:29,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-07-19 09:58:29,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-07-19 09:58:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=9978, Unknown=1, NotChecked=0, Total=10506 [2022-07-19 09:58:29,336 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:40,672 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2022-07-19 09:58:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-19 09:58:40,672 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 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 75 [2022-07-19 09:58:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:40,673 INFO L225 Difference]: With dead ends: 146 [2022-07-19 09:58:40,673 INFO L226 Difference]: Without dead ends: 142 [2022-07-19 09:58:40,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 86 SyntacticMatches, 29 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8927 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=1834, Invalid=32205, Unknown=1, NotChecked=0, Total=34040 [2022-07-19 09:58:40,675 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:40,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 163 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1388 Invalid, 0 Unknown, 891 Unchecked, 0.9s Time] [2022-07-19 09:58:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-19 09:58:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2022-07-19 09:58:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2022-07-19 09:58:40,688 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 75 [2022-07-19 09:58:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:40,689 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2022-07-19 09:58:40,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2022-07-19 09:58:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 09:58:40,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:40,690 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:58:40,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 09:58:40,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:40,899 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2022-07-19 09:58:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:40,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28240888] [2022-07-19 09:58:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-19 09:58:40,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:40,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28240888] [2022-07-19 09:58:40,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28240888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:40,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697807637] [2022-07-19 09:58:40,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:58:40,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:40,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:40,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:58:40,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 09:58:41,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:58:41,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:58:41,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:58:41,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-19 09:58:41,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-19 09:58:41,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697807637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:41,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:41,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-19 09:58:41,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854121172] [2022-07-19 09:58:41,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:41,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:58:41,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:41,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:58:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:58:41,268 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:41,585 INFO L93 Difference]: Finished difference Result 290 states and 318 transitions. [2022-07-19 09:58:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 09:58:41,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 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 77 [2022-07-19 09:58:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:41,587 INFO L225 Difference]: With dead ends: 290 [2022-07-19 09:58:41,587 INFO L226 Difference]: Without dead ends: 137 [2022-07-19 09:58:41,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:58:41,587 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 213 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:41,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 41 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:58:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-19 09:58:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2022-07-19 09:58:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2022-07-19 09:58:41,597 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 77 [2022-07-19 09:58:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:41,597 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2022-07-19 09:58:41,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2022-07-19 09:58:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 09:58:41,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:41,598 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:58:41,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 09:58:41,807 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,SelfDestructingSolverStorable12 [2022-07-19 09:58:41,807 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 437686490, now seen corresponding path program 11 times [2022-07-19 09:58:41,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:41,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96829022] [2022-07-19 09:58:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:41,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-19 09:58:41,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:41,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96829022] [2022-07-19 09:58:41,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96829022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:41,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125010712] [2022-07-19 09:58:41,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:58:41,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:41,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:41,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:58:41,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 09:58:42,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 09:58:42,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:58:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:58:42,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-19 09:58:42,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-19 09:58:42,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125010712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:42,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:42,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-19 09:58:42,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361413840] [2022-07-19 09:58:42,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:42,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:58:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:58:42,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:58:42,229 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:58:42,531 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2022-07-19 09:58:42,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 09:58:42,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 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 81 [2022-07-19 09:58:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:58:42,532 INFO L225 Difference]: With dead ends: 130 [2022-07-19 09:58:42,532 INFO L226 Difference]: Without dead ends: 96 [2022-07-19 09:58:42,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-07-19 09:58:42,533 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 170 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:58:42,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 23 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:58:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-19 09:58:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-07-19 09:58:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-07-19 09:58:42,541 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 81 [2022-07-19 09:58:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:58:42,541 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-07-19 09:58:42,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:58:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-07-19 09:58:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 09:58:42,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:58:42,541 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:58:42,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 09:58:42,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 09:58:42,742 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:58:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:58:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2022-07-19 09:58:42,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:58:42,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098565244] [2022-07-19 09:58:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:58:42,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:58:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:58:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:58:48,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:58:48,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098565244] [2022-07-19 09:58:48,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098565244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:58:48,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374322074] [2022-07-19 09:58:48,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:58:48,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:58:48,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:58:48,273 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:58:48,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 09:58:48,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 09:58:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:58:48,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-19 09:58:48,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:58:52,615 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:58:52,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-07-19 09:58:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 3 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:58:52,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:59:00,750 INFO L356 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2022-07-19 09:59:00,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 285 [2022-07-19 09:59:01,685 INFO L356 Elim1Store]: treesize reduction 591, result has 10.2 percent of original size [2022-07-19 09:59:01,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 88 treesize of output 82 [2022-07-19 09:59:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 09:59:01,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374322074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:59:01,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:59:01,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 32, 26] total 124 [2022-07-19 09:59:01,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336279390] [2022-07-19 09:59:01,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:59:01,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-07-19 09:59:01,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:59:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-07-19 09:59:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=762, Invalid=14490, Unknown=0, NotChecked=0, Total=15252 [2022-07-19 09:59:01,829 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 124 states, 124 states have (on average 2.0161290322580645) internal successors, (250), 124 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:59:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:59:15,261 INFO L93 Difference]: Finished difference Result 273 states and 295 transitions. [2022-07-19 09:59:15,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-07-19 09:59:15,261 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0161290322580645) internal successors, (250), 124 states have internal predecessors, (250), 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 89 [2022-07-19 09:59:15,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:59:15,262 INFO L225 Difference]: With dead ends: 273 [2022-07-19 09:59:15,262 INFO L226 Difference]: Without dead ends: 267 [2022-07-19 09:59:15,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 104 SyntacticMatches, 32 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16747 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=2520, Invalid=46100, Unknown=0, NotChecked=0, Total=48620 [2022-07-19 09:59:15,265 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1785 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:59:15,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 201 Invalid, 4373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 2228 Invalid, 0 Unknown, 1785 Unchecked, 1.4s Time] [2022-07-19 09:59:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-19 09:59:15,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 157. [2022-07-19 09:59:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0897435897435896) internal successors, (170), 156 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:59:15,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2022-07-19 09:59:15,284 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 89 [2022-07-19 09:59:15,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:59:15,284 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2022-07-19 09:59:15,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0161290322580645) internal successors, (250), 124 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:59:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2022-07-19 09:59:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 09:59:15,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:59:15,285 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:59:15,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 09:59:15,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 09:59:15,496 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:59:15,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:59:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash -91318780, now seen corresponding path program 13 times [2022-07-19 09:59:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:59:15,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104571657] [2022-07-19 09:59:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:59:15,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:59:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:59:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-19 09:59:15,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:59:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104571657] [2022-07-19 09:59:15,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104571657] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:59:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785315837] [2022-07-19 09:59:15,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:59:15,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:59:15,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:59:15,601 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:59:15,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 09:59:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:59:15,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 09:59:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:59:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-19 09:59:15,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:59:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-19 09:59:15,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785315837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:59:15,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:59:15,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-19 09:59:15,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279125500] [2022-07-19 09:59:15,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:59:15,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 09:59:15,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:59:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 09:59:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:59:15,942 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:59:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:59:16,324 INFO L93 Difference]: Finished difference Result 350 states and 379 transitions. [2022-07-19 09:59:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 09:59:16,324 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 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 91 [2022-07-19 09:59:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:59:16,325 INFO L225 Difference]: With dead ends: 350 [2022-07-19 09:59:16,325 INFO L226 Difference]: Without dead ends: 170 [2022-07-19 09:59:16,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-19 09:59:16,326 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 220 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:59:16,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 45 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:59:16,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-19 09:59:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2022-07-19 09:59:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0738255033557047) internal successors, (160), 149 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:59:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2022-07-19 09:59:16,339 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 91 [2022-07-19 09:59:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:59:16,339 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2022-07-19 09:59:16,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:59:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2022-07-19 09:59:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 09:59:16,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:59:16,340 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:59:16,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 09:59:16,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 09:59:16,544 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:59:16,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:59:16,545 INFO L85 PathProgramCache]: Analyzing trace with hash 688277478, now seen corresponding path program 14 times [2022-07-19 09:59:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:59:16,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399568423] [2022-07-19 09:59:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:59:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:59:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:59:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-19 09:59:16,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:59:16,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399568423] [2022-07-19 09:59:16,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399568423] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:59:16,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251382599] [2022-07-19 09:59:16,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:59:16,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:59:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:59:16,649 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:59:16,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 09:59:16,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:59:16,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:59:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 09:59:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:59:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-19 09:59:16,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:59:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-19 09:59:16,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251382599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:59:16,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:59:16,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-19 09:59:16,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720221513] [2022-07-19 09:59:16,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:59:16,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 09:59:16,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:59:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 09:59:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:59:16,917 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:59:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:59:17,290 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2022-07-19 09:59:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 09:59:17,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 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 93 [2022-07-19 09:59:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:59:17,291 INFO L225 Difference]: With dead ends: 162 [2022-07-19 09:59:17,291 INFO L226 Difference]: Without dead ends: 110 [2022-07-19 09:59:17,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 09:59:17,292 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:59:17,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 26 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:59:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-19 09:59:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2022-07-19 09:59:17,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 103 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:59:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2022-07-19 09:59:17,302 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 93 [2022-07-19 09:59:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:59:17,302 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2022-07-19 09:59:17,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:59:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2022-07-19 09:59:17,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 09:59:17,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:59:17,303 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:59:17,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 09:59:17,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:59:17,520 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:59:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:59:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1101361904, now seen corresponding path program 15 times [2022-07-19 09:59:17,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:59:17,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791737308] [2022-07-19 09:59:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:59:17,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:59:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:59:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 2 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:59:25,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:59:25,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791737308] [2022-07-19 09:59:25,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791737308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:59:25,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757832763] [2022-07-19 09:59:25,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:59:25,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:59:25,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:59:25,123 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:59:25,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 09:59:25,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 09:59:25,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:59:25,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 172 conjunts are in the unsatisfiable core [2022-07-19 09:59:25,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:59:25,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 09:59:31,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:31,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:31,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:31,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:31,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:31,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:31,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:31,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:59:31,193 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:59:31,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 101 [2022-07-19 09:59:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 7 proven. 236 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:59:31,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:59:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 09:59:43,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757832763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:59:43,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:59:43,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 35, 29] total 143 [2022-07-19 09:59:43,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341597990] [2022-07-19 09:59:43,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:59:43,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-07-19 09:59:43,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:59:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-07-19 09:59:43,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=19304, Unknown=0, NotChecked=0, Total=20306 [2022-07-19 09:59:43,167 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 143 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:00:04,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:00:04,984 INFO L93 Difference]: Finished difference Result 198 states and 211 transitions. [2022-07-19 10:00:04,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-07-19 10:00:04,984 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 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 103 [2022-07-19 10:00:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:00:04,985 INFO L225 Difference]: With dead ends: 198 [2022-07-19 10:00:04,985 INFO L226 Difference]: Without dead ends: 194 [2022-07-19 10:00:04,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 126 SyntacticMatches, 36 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 17730 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=3128, Invalid=56164, Unknown=0, NotChecked=0, Total=59292 [2022-07-19 10:00:04,987 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 2656 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 4553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1558 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:00:04,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 216 Invalid, 4553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2656 Invalid, 0 Unknown, 1558 Unchecked, 1.7s Time] [2022-07-19 10:00:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-19 10:00:05,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 151. [2022-07-19 10:00:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0733333333333333) internal successors, (161), 150 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:00:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2022-07-19 10:00:05,006 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 103 [2022-07-19 10:00:05,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:00:05,007 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2022-07-19 10:00:05,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 143 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:00:05,007 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2022-07-19 10:00:05,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-19 10:00:05,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:00:05,008 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:00:05,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 10:00:05,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 10:00:05,212 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:00:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:00:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1793599822, now seen corresponding path program 16 times [2022-07-19 10:00:05,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:00:05,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102476319] [2022-07-19 10:00:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:00:05,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:00:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:00:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-19 10:00:05,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:00:05,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102476319] [2022-07-19 10:00:05,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102476319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:00:05,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269533519] [2022-07-19 10:00:05,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:00:05,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:00:05,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:00:05,334 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:00:05,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 10:00:05,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:00:05,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:00:05,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 10:00:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:00:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-19 10:00:05,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:00:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-19 10:00:05,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269533519] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:00:05,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:00:05,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-19 10:00:05,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112706860] [2022-07-19 10:00:05,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:00:05,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 10:00:05,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:00:05,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 10:00:05,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:00:05,722 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:00:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:00:06,185 INFO L93 Difference]: Finished difference Result 386 states and 414 transitions. [2022-07-19 10:00:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 10:00:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-07-19 10:00:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:00:06,186 INFO L225 Difference]: With dead ends: 386 [2022-07-19 10:00:06,186 INFO L226 Difference]: Without dead ends: 177 [2022-07-19 10:00:06,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 10:00:06,187 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 411 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:00:06,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 37 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:00:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-19 10:00:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 158. [2022-07-19 10:00:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0636942675159236) internal successors, (167), 157 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:00:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 167 transitions. [2022-07-19 10:00:06,205 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 167 transitions. Word has length 105 [2022-07-19 10:00:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:00:06,205 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 167 transitions. [2022-07-19 10:00:06,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:00:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 167 transitions. [2022-07-19 10:00:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-19 10:00:06,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:00:06,206 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:00:06,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-19 10:00:06,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:00:06,408 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:00:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:00:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1629639498, now seen corresponding path program 17 times [2022-07-19 10:00:06,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:00:06,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122105496] [2022-07-19 10:00:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:00:06,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:00:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:00:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-19 10:00:06,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:00:06,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122105496] [2022-07-19 10:00:06,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122105496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:00:06,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501552155] [2022-07-19 10:00:06,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:00:06,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:00:06,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:00:06,535 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:00:06,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 10:00:06,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-19 10:00:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:00:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 10:00:06,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:00:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-19 10:00:07,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:00:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-19 10:00:07,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501552155] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:00:07,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:00:07,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-19 10:00:07,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820493852] [2022-07-19 10:00:07,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:00:07,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 10:00:07,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:00:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 10:00:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:00:07,287 INFO L87 Difference]: Start difference. First operand 158 states and 167 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:00:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:00:07,713 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2022-07-19 10:00:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 10:00:07,713 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 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 109 [2022-07-19 10:00:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:00:07,714 INFO L225 Difference]: With dead ends: 170 [2022-07-19 10:00:07,714 INFO L226 Difference]: Without dead ends: 124 [2022-07-19 10:00:07,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 10:00:07,714 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 238 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:00:07,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 33 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:00:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-19 10:00:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2022-07-19 10:00:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0598290598290598) internal successors, (124), 117 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:00:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2022-07-19 10:00:07,729 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 109 [2022-07-19 10:00:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:00:07,730 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2022-07-19 10:00:07,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:00:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2022-07-19 10:00:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-19 10:00:07,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:00:07,730 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:00:07,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 10:00:07,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:00:07,935 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:00:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:00:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash 680376510, now seen corresponding path program 18 times [2022-07-19 10:00:07,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:00:07,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793217086] [2022-07-19 10:00:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:00:07,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:00:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:00:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 20 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:00:19,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:00:19,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793217086] [2022-07-19 10:00:19,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793217086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:00:19,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247649135] [2022-07-19 10:00:19,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:00:19,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:00:19,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:00:19,075 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:00:19,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 10:00:19,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-19 10:00:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:00:19,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 196 conjunts are in the unsatisfiable core [2022-07-19 10:00:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:00:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:31,535 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 10:00:31,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 100 treesize of output 361 [2022-07-19 10:00:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 11 proven. 307 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 10:00:32,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:00:47,426 INFO L356 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2022-07-19 10:00:47,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 332 [2022-07-19 10:00:48,022 INFO L356 Elim1Store]: treesize reduction 1343, result has 10.2 percent of original size [2022-07-19 10:00:48,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 133 treesize of output 171 [2022-07-19 10:00:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 10:00:48,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247649135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:00:48,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:00:48,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 38, 34] total 167 [2022-07-19 10:00:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710037306] [2022-07-19 10:00:48,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:00:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-07-19 10:00:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:00:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-07-19 10:00:48,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1285, Invalid=26437, Unknown=0, NotChecked=0, Total=27722 [2022-07-19 10:00:48,242 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 167 states, 167 states have (on average 1.9341317365269461) internal successors, (323), 167 states have internal predecessors, (323), 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)